diff --git a/inc/composer.lock b/inc/composer.lock
index 63558d3..29c64e5 100644
--- a/inc/composer.lock
+++ b/inc/composer.lock
@@ -45,31 +45,148 @@
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         },
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-                "reference": "1ea674a8308baf547cbcbd30c5fcd6d301b7c000"
+                "url": "https://github.com/ezyang/htmlpurifier.git",
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-                "reference": "1ea674a8308baf547cbcbd30c5fcd6d301b7c000",
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-                "phpcompatibility/php-compatibility": "^8.0",
+                "simpletest/simpletest": "dev-master#72de02a7b80c6bb8864ef9bf66d41d2f58f826bd"
+            },
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+            "autoload": {
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+                "files": [
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+                ],
+                "exclude-from-classmap": [
+                    "/library/HTMLPurifier/Language/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "LGPL-2.1-or-later"
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+                    "email": "admin@htmlpurifier.org",
+                    "homepage": "http://ezyang.com"
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+            "description": "Standards compliant HTML filter written in PHP",
+            "homepage": "http://htmlpurifier.org/",
+            "keywords": [
+                "html"
+            ],
+            "time": "2020-06-29T00:56:53+00:00"
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+                "mikey179/vfsstream": "^1.6",
+                "phpunit/phpunit": ">= 7.5"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "ZipStream\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Paul Duncan",
+                    "email": "pabs@pablotron.org"
+                },
+                {
+                    "name": "Jonatan Männchen",
+                    "email": "jonatan@maennchen.ch"
+                },
+                {
+                    "name": "Jesse Donat",
+                    "email": "donatj@gmail.com"
+                },
+                {
+                    "name": "András Kolesár",
+                    "email": "kolesar@kolesar.hu"
+                }
+            ],
+            "description": "ZipStream is a library for dynamically streaming dynamic zip files from PHP without writing to the disk at all on the server.",
+            "keywords": [
+                "stream",
+                "zip"
+            ],
+            "funding": [
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+                    "type": "open_collective"
+                }
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+            "time": "2020-05-30T13:11:16+00:00"
+        },
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+            "name": "markbaker/complex",
+            "version": "2.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/MarkBaker/PHPComplex.git",
+                "reference": "9999f1432fae467bc93c53f357105b4c31bb994c"
+            },
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+                "url": "https://api.github.com/repos/MarkBaker/PHPComplex/zipball/9999f1432fae467bc93c53f357105b4c31bb994c",
+                "reference": "9999f1432fae467bc93c53f357105b4c31bb994c",
+                "shasum": ""
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+            "require": {
+                "php": "^7.2 || ^8.0"
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+            "require-dev": {
+                "dealerdirect/phpcodesniffer-composer-installer": "^0.7.0",
+                "phpcompatibility/php-compatibility": "^9.0",
                 "phpdocumentor/phpdocumentor": "2.*",
-                "phploc/phploc": "2.*",
+                "phploc/phploc": "^4.0",
                 "phpmd/phpmd": "2.*",
-                "phpunit/phpunit": "^4.8.35|^5.4.0",
-                "sebastian/phpcpd": "2.*",
-                "squizlabs/php_codesniffer": "^3.3.0"
+                "phpunit/phpunit": "^7.0 || ^8.0 || ^9.3",
+                "sebastian/phpcpd": "^4.0",
+                "squizlabs/php_codesniffer": "^3.4"
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@@ -137,7 +254,77 @@
                 "complex",
                 "mathematics"
             ],
-            "time": "2018-10-13T23:28:42+00:00"
+            "time": "2020-08-26T10:42:07+00:00"
+        },
+        {
+            "name": "markbaker/matrix",
+            "version": "2.1.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/MarkBaker/PHPMatrix.git",
+                "reference": "361c0f545c3172ee26c3d596a0aa03f0cef65e6a"
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+                "shasum": ""
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+                "squizlabs/php_codesniffer": "^3.4"
+            },
+            "type": "library",
+            "autoload": {
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+                    "Matrix\\": "classes/src/"
+                },
+                "files": [
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+                    "classes/src/Functions/antidiagonal.php",
+                    "classes/src/Functions/cofactors.php",
+                    "classes/src/Functions/determinant.php",
+                    "classes/src/Functions/diagonal.php",
+                    "classes/src/Functions/identity.php",
+                    "classes/src/Functions/inverse.php",
+                    "classes/src/Functions/minors.php",
+                    "classes/src/Functions/trace.php",
+                    "classes/src/Functions/transpose.php",
+                    "classes/src/Operations/add.php",
+                    "classes/src/Operations/directsum.php",
+                    "classes/src/Operations/subtract.php",
+                    "classes/src/Operations/multiply.php",
+                    "classes/src/Operations/divideby.php",
+                    "classes/src/Operations/divideinto.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Mark Baker",
+                    "email": "mark@demon-angel.eu"
+                }
+            ],
+            "description": "PHP Class for working with matrices",
+            "homepage": "https://github.com/MarkBaker/PHPMatrix",
+            "keywords": [
+                "mathematics",
+                "matrix",
+                "vector"
+            ],
+            "time": "2021-01-23T16:37:31+00:00"
         },
         {
             "name": "monolog/monolog",
@@ -217,6 +404,62 @@
             ],
             "time": "2017-06-19T01:22:40+00:00"
         },
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+            "version": "1.8.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/myclabs/php-enum.git",
+                "reference": "46cf3d8498b095bd33727b13fd5707263af99421"
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+                "reference": "46cf3d8498b095bd33727b13fd5707263af99421",
+                "shasum": ""
+            },
+            "require": {
+                "ext-json": "*",
+                "php": "^7.3 || ^8.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^9.5",
+                "squizlabs/php_codesniffer": "1.*",
+                "vimeo/psalm": "^4.5.1"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "MyCLabs\\Enum\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "PHP Enum contributors",
+                    "homepage": "https://github.com/myclabs/php-enum/graphs/contributors"
+                }
+            ],
+            "description": "PHP Enum implementation",
+            "homepage": "http://github.com/myclabs/php-enum",
+            "keywords": [
+                "enum"
+            ],
+            "funding": [
+                {
+                    "url": "https://github.com/mnapoli",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/myclabs/php-enum",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2021-02-15T16:11:48+00:00"
+        },
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             "name": "openlss/lib-array2xml",
             "version": "0.5.1",
@@ -311,21 +554,22 @@
         },
         {
             "name": "phpoffice/phpspreadsheet",
-            "version": "1.4.1",
+            "version": "1.16.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/PHPOffice/PhpSpreadsheet.git",
-                "reference": "57404f43742a8164b5eac3ab03b962d8740885c1"
+                "reference": "76d4323b85129d0c368149c831a07a3e258b2b50"
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-                "reference": "57404f43742a8164b5eac3ab03b962d8740885c1",
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             "require": {
                 "ext-ctype": "*",
                 "ext-dom": "*",
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                 "ext-gd": "*",
                 "ext-iconv": "*",
                 "ext-libxml": "*",
@@ -336,24 +580,30 @@
                 "ext-xmlwriter": "*",
                 "ext-zip": "*",
                 "ext-zlib": "*",
-                "markbaker/complex": "^1.4.1",
-                "php": "^5.6|^7.0",
+                "ezyang/htmlpurifier": "^4.13",
+                "maennchen/zipstream-php": "^2.1",
+                "markbaker/complex": "^1.5||^2.0",
+                "markbaker/matrix": "^1.2||^2.0",
+                "php": "^7.2||^8.0",
+                "psr/http-client": "^1.0",
+                "psr/http-factory": "^1.0",
                 "psr/simple-cache": "^1.0"
             },
             "require-dev": {
-                "dompdf/dompdf": "^0.8.0",
-                "friendsofphp/php-cs-fixer": "@stable",
+                "dompdf/dompdf": "^0.8.5",
+                "friendsofphp/php-cs-fixer": "^2.16",
                 "jpgraph/jpgraph": "^4.0",
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-                "phpunit/phpunit": "^5.7",
-                "squizlabs/php_codesniffer": "^3.3",
-                "tecnickcom/tcpdf": "^6.2"
+                "mpdf/mpdf": "^8.0",
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+                "squizlabs/php_codesniffer": "^3.5",
+                "tecnickcom/tcpdf": "^6.3"
             },
             "suggest": {
-                "dompdf/dompdf": "Option for rendering PDF with PDF Writer",
+                "dompdf/dompdf": "Option for rendering PDF with PDF Writer (doesn't yet support PHP8)",
                 "jpgraph/jpgraph": "Option for rendering charts, or including charts with PDF or HTML Writers",
                 "mpdf/mpdf": "Option for rendering PDF with PDF Writer",
-                "tecnickcom/tcpdf": "Option for rendering PDF with PDF Writer"
+                "tecnickcom/tcpdf": "Option for rendering PDF with PDF Writer (doesn't yet support PHP8)"
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@@ -363,23 +613,26 @@
             },
             "notification-url": "https://packagist.org/downloads/",
             "license": [
-                "LGPL-2.1-or-later"
+                "MIT"
             ],
             "authors": [
                 {
                     "name": "Maarten Balliauw",
-                    "homepage": "http://blog.maartenballiauw.be"
+                    "homepage": "https://blog.maartenballiauw.be"
+                },
+                {
+                    "name": "Mark Baker",
+                    "homepage": "https://markbakeruk.net"
+                },
+                {
+                    "name": "Franck Lefevre",
+                    "homepage": "https://rootslabs.net"
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                 {
                     "name": "Erik Tilt"
                 },
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-                    "name": "Franck Lefevre",
-                    "homepage": "http://rootslabs.net"
-                },
-                {
-                    "name": "Mark Baker",
-                    "homepage": "http://markbakeruk.net"
+                    "name": "Adrien Crivelli"
                 }
             ],
             "description": "PHPSpreadsheet - Read, Create and Write Spreadsheet documents in PHP - Spreadsheet engine",
@@ -394,7 +647,158 @@
                 "xls",
                 "xlsx"
             ],
-            "time": "2018-09-30T03:57:24+00:00"
+            "time": "2020-12-31T18:03:49+00:00"
+        },
+        {
+            "name": "psr/http-client",
+            "version": "1.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/php-fig/http-client.git",
+                "reference": "2dfb5f6c5eff0e91e20e913f8c5452ed95b86621"
+            },
+            "dist": {
+                "type": "zip",
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+                "reference": "2dfb5f6c5eff0e91e20e913f8c5452ed95b86621",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.0 || ^8.0",
+                "psr/http-message": "^1.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Psr\\Http\\Client\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "PHP-FIG",
+                    "homepage": "http://www.php-fig.org/"
+                }
+            ],
+            "description": "Common interface for HTTP clients",
+            "homepage": "https://github.com/php-fig/http-client",
+            "keywords": [
+                "http",
+                "http-client",
+                "psr",
+                "psr-18"
+            ],
+            "time": "2020-06-29T06:28:15+00:00"
+        },
+        {
+            "name": "psr/http-factory",
+            "version": "1.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/php-fig/http-factory.git",
+                "reference": "12ac7fcd07e5b077433f5f2bee95b3a771bf61be"
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+                "shasum": ""
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+            "require": {
+                "php": ">=7.0.0",
+                "psr/http-message": "^1.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Psr\\Http\\Message\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
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+                    "name": "PHP-FIG",
+                    "homepage": "http://www.php-fig.org/"
+                }
+            ],
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+                "factory",
+                "http",
+                "message",
+                "psr",
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+                "psr-7",
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+                "response"
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+            "time": "2019-04-30T12:38:16+00:00"
+        },
+        {
+            "name": "psr/http-message",
+            "version": "1.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/php-fig/http-message.git",
+                "reference": "f6561bf28d520154e4b0ec72be95418abe6d9363"
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+                "shasum": ""
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+            "require": {
+                "php": ">=5.3.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Psr\\Http\\Message\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "PHP-FIG",
+                    "homepage": "http://www.php-fig.org/"
+                }
+            ],
+            "description": "Common interface for HTTP messages",
+            "homepage": "https://github.com/php-fig/http-message",
+            "keywords": [
+                "http",
+                "http-message",
+                "psr",
+                "psr-7",
+                "request",
+                "response"
+            ],
+            "time": "2016-08-06T14:39:51+00:00"
         },
         {
             "name": "psr/log",
@@ -491,6 +895,83 @@
             ],
             "time": "2017-10-23T01:57:42+00:00"
         },
+        {
+            "name": "symfony/polyfill-mbstring",
+            "version": "v1.22.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/polyfill-mbstring.git",
+                "reference": "5232de97ee3b75b0360528dae24e73db49566ab1"
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+                "url": "https://api.github.com/repos/symfony/polyfill-mbstring/zipball/5232de97ee3b75b0360528dae24e73db49566ab1",
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+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7.1"
+            },
+            "suggest": {
+                "ext-mbstring": "For best performance"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-main": "1.22-dev"
+                },
+                "thanks": {
+                    "name": "symfony/polyfill",
+                    "url": "https://github.com/symfony/polyfill"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Polyfill\\Mbstring\\": ""
+                },
+                "files": [
+                    "bootstrap.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Nicolas Grekas",
+                    "email": "p@tchwork.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony polyfill for the Mbstring extension",
+            "homepage": "https://symfony.com",
+            "keywords": [
+                "compatibility",
+                "mbstring",
+                "polyfill",
+                "portable",
+                "shim"
+            ],
+            "funding": [
+                {
+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2021-01-22T09:19:47+00:00"
+        },
         {
             "name": "tecnickcom/tcpdf",
             "version": "6.2.26",
@@ -1224,6 +1705,7 @@
             "keywords": [
                 "tokenizer"
             ],
+            "abandoned": true,
             "time": "2018-02-01T13:16:43+00:00"
         },
         {
@@ -1918,12 +2400,12 @@
             "version": "1.3.0",
             "source": {
                 "type": "git",
-                "url": "https://github.com/webmozart/assert.git",
+                "url": "https://github.com/webmozarts/assert.git",
                 "reference": "0df1908962e7a3071564e857d86874dad1ef204a"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/webmozart/assert/zipball/0df1908962e7a3071564e857d86874dad1ef204a",
+                "url": "https://api.github.com/repos/webmozarts/assert/zipball/0df1908962e7a3071564e857d86874dad1ef204a",
                 "reference": "0df1908962e7a3071564e857d86874dad1ef204a",
                 "shasum": ""
             },
@@ -1970,5 +2452,6 @@
     "prefer-stable": false,
     "prefer-lowest": false,
     "platform": [],
-    "platform-dev": []
+    "platform-dev": [],
+    "plugin-api-version": "1.1.0"
 }