Support PHP 8 (#23)

* Update composer.json

.github/workflows/run-tests.yml

@@ -12,7 +12,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php: [8.0,7.3,7.4]
+        php: [8.0, 7.4, 7.3]
         laravel: [8.*]
         dependency-version: [prefer-lowest, prefer-stable]
         include:
@@ -32,7 +32,7 @@ jobs:
           key: dependencies-laravel-${{ matrix.laravel }}-php-${{ matrix.php }}-composer-${{ hashFiles('composer.json') }}
 
       - name: Setup PHP
-        uses: shivammathur/setup-php@v1
+        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

composer.json

@@ -27,7 +27,8 @@
         "phpunit/phpunit": "^9.4"
     },
     "conflict": {
-        "mockery/mockery": "<1.4.2"
+        "mockery/mockery": "<1.4.2",
+        "symfony/http-foundation": "<5.1.9"
     },
     "autoload": {
         "psr-4": {