only run on ubuntu

Author: Gummibeer

.github/workflows/run-tests.yml

@@ -17,7 +17,7 @@ jobs:
         php: [7.4, 7.3, 7.2]
         laravel: [8.*, 7.*, 6.*, 5.8.*]
         dependency-version: [prefer-lowest, prefer-stable]
-        os: [ubuntu-latest, windows-latest, macos-latest]
+        os: [ubuntu-latest]
         include:
           - laravel: 8.*
             testbench: 6.*
@@ -41,21 +41,22 @@ jobs:
         uses: actions/checkout@v2
 
       - 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-${{ hashFiles('composer.json') }}
-          keys: |
+          restore-keys: |
             dependencies-laravel-${{ matrix.laravel }}-php-${{ matrix.php }}-composer-
             dependencies-laravel-${{ matrix.laravel }}-php-
             dependencies-laravel-
 
       - 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, sqlit3, pdo_sqlite
           coverage: xdebug
+          tools: composer:v2
 
       - name: Install dependencies
         run: |