clean up dependency version and update GitHub actions

.github/workflows/phpunit.yml

@@ -33,16 +33,16 @@ jobs:
               uses: actions/checkout@v1
 
             - name: Cache dependencies
-              uses: actions/cache@v1
+              uses: actions/cache@v2
               with:
                   path: ~/.composer/cache/files
                   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 }}
-                  extension: dom, curl, libxml, mbstring, pcntl, bcmath, intl, gd, exif, iconv
+                  extensions: dom, curl, libxml, mbstring, pcntl, intl, exif, iconv
                   coverage: none
 
             - name: Install dependencies

README.md

@@ -10,6 +10,8 @@ Small Laravel 6+ package that'll generate the integrity hashes for your style an
 
 For Laravel 5.5+ support, use the [v1 branch](https://github.com/Elhebert/laravel-sri/tree/v1).
 
+For Laravel 8+ support, use the [master branch](https://github.com/Elhebert/laravel-sri).
+
 ## About Subresources Integrity
 
 From [MDN](https://developer.mozilla.org/en-US/docs/Web/Security/Subresource_Integrity):
@@ -24,7 +26,7 @@ Troy Hunt wrote an article speaking on the subject, you can read it [here](https
 composer require elhebert/laravel-sri
 ```
 
-This package uses [auto-discovery](https://laravel.com/docs/5.5/packages#package-discovery), so you don't have to do anything. It works out of the box.
+This package uses [auto-discovery](https://laravel.com/docs/6.x/packages#package-discovery), so you don't have to do anything. It works out of the box.
 
 ## Config
 

composer.json

@@ -15,10 +15,10 @@
     ],
     "require": {
         "php": "^7.2.5 | ^7.3 | ^7.4 | ^8.0",
-        "illuminate/support": "^6.0 | ^7.0 | ^8.0"
+        "illuminate/support": "^6.0 | ^7.0"
     },
     "require-dev": {
-        "orchestra/testbench": "^4.0 | ^5.0 | ^6.0",
+        "orchestra/testbench": "^4.0 | ^5.0",
         "phpunit/phpunit": "^8.0 | ^9.0 | ^9.3"
     },
     "autoload": {