Support for PHP 8.0 (#1)

* Update composer.json
* Drop support for Laravel 6 and 7

.github/workflows/run-tests.yml

@@ -0,0 +1,37 @@
+name: run-tests
+
+on: [push, pull_request]
+
+jobs:
+    test:
+        runs-on: ubuntu-latest
+        strategy:
+            fail-fast: true
+            matrix:
+                php: [8.0, 7.4]
+                laravel: [8.*]
+                dependency-version: [prefer-lowest, prefer-stable]
+                include:
+                    -   laravel: 8.*
+                        testbench: 6.*
+
+        name: P${{ matrix.php }} - L${{ matrix.laravel }} - ${{ matrix.dependency-version }}
+
+        steps:
+            -   name: Checkout code
+                uses: actions/checkout@v2
+
+            -   name: Setup PHP
+                uses: shivammathur/setup-php@v2
+                with:
+                    php-version: ${{ matrix.php }}
+                    extensions: dom, curl, libxml, mbstring, zip, pcntl, pdo, sqlite, pdo_sqlite, bcmath, soap, intl, gd, exif, iconv, imagick, mysql, mysqli, pdo_mysql
+                    coverage: none
+
+            -   name: Install dependencies
+                run: |
+                    composer require "laravel/framework:${{ matrix.laravel }}" "orchestra/testbench:${{ matrix.testbench }}" --no-interaction --no-update
+                    composer update --${{ matrix.dependency-version }} --prefer-dist --no-interaction --no-suggest
+
+            -   name: Execute tests
+                run: vendor/bin/phpunit

README.md

@@ -8,7 +8,9 @@
 
 ## Installation
 
-This package requires PHP 7.4 and Laravel 6.0 or higher. You can install the package via composer:
+Only the master branch and version 3.0 of this package are compatible with Laravel 8.0. If you're still using an older version of Laravel (or PHP < 7.4), please use the 2.x branch. Mind that older versions are no longer supported.
+
+You can install the package via composer:
 
 ```bash
 composer require protonemedia/laravel-mixins

composer.json

@@ -16,18 +16,18 @@
         }
     ],
     "require": {
-        "php": "^7.4",
-        "illuminate/support": "^6.0 || ^7.0 || ^8.0"
+        "php": "^7.4 || ^8.0",
+        "illuminate/support": "^8.0"
     },
     "require-dev": {
         "html2text/html2text": "^4.3",
-        "laravel/ui": "^1.0 || ^2.0",
-        "mockery/mockery": "^1.3",
+        "laravel/ui": "^2.0 || ^3.0",
+        "mockery/mockery": "^1.3.3",
         "moneyphp/money": "^3.3",
-        "orchestra/testbench": "^4.2 || ^5.0 || ^6.0",
-        "phpunit/phpunit": "^8.5",
+        "orchestra/testbench": "^6.0",
+        "phpunit/phpunit": "^9.0",
         "spatie/laravel-sitemap": "^5.7",
-        "symfony/process": "^4.3 || ^5.1"
+        "symfony/process": "^5.1"
     },
     "suggest": {
         "html2text/html2text": "To convert HTML to formatted plain text",