Enhancement: Run phpunit on GitHub Actions

.github/workflows/build.yaml

@@ -82,3 +82,42 @@ jobs:
 
       - name: Run friendsofphp/php-cs-fixer
         run: vendor/bin/php-cs-fixer fix -v --diff --dry-run
+
+  tests:
+    name: Tests
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        php-version:
+          - 7.2
+          - 7.3
+          - 7.4
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Install PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          coverage: none
+          php-version: ${{ matrix.php-version }}
+
+      - name: Determine composer cache directory
+        id: determine-composer-cache-directory
+        run: echo "::set-output name=directory::$(composer config cache-dir)"
+
+      - name: Cache dependencies installed with composer
+        uses: actions/cache@v2
+        with:
+          path: ${{ steps.determine-composer-cache-directory.outputs.directory }}
+          key: php-${{ matrix.php-version }}-composer-${{ hashFiles('composer.json') }}
+          restore-keys: php-${{ matrix.php-version }}-composer-
+
+      - name: Install dependencies
+        run: composer install --no-interaction
+
+      - name: Run phpunit/phpunit
+        run: vendor/bin/phpunit

.travis.yml

@@ -6,14 +6,10 @@ cache:
 
 php:
   - 7.2
-  - 7.3
-  - 7.4
 
 install:
   - travis_retry composer install --no-interaction
 
-script: ./vendor/bin/phpunit
-
 jobs:
   include:
     - stage: Code coverage