switch to github actions

.github/workflows/code-sniffer.yml

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+name: "CodeSniffer"
+
+on:
+  pull_request:
+  push:
+    branches:
+      - "master"
+
+jobs:
+  codesniffer:
+    name: "CodeSniffer"
+
+    runs-on: "ubuntu-latest"
+
+    strategy:
+      matrix:
+        php-version:
+          - "7.4"
+
+    steps:
+      - name: "Checkout"
+        uses: "actions/checkout@v2"
+
+      - name: "Install PHP"
+        uses: "shivammathur/setup-php@v2"
+        with:
+          ini-values: memory_limit=-1
+
+      - name: "Install dependencies"
+        run: "composer install --no-interaction --no-progress --no-suggest"
+
+      - name: "Code Sniffer"
+        run: "vendor/bin/phpcs --standard=PSR2 ./src ./tests/AssetManagerTest"

.github/workflows/phpunit.yml

@@ -0,0 +1,70 @@
+name: "PHPUnit tests"
+
+on:
+  pull_request:
+  push:
+    branches:
+      - "master"
+
+jobs:
+  phpunit:
+    name: "PHPUnit tests"
+
+    runs-on: ${{ matrix.operating-system }}
+
+    strategy:
+      matrix:
+        dependencies:
+          - "lowest"
+          - "highest"
+        php-version:
+          - "7.3"
+          - "7.4"
+          - "8.0"
+        operating-system:
+          - "ubuntu-latest"
+
+    steps:
+      - name: "Checkout"
+        uses: "actions/checkout@v2"
+
+      - name: "Install PHP"
+        uses: "shivammathur/setup-php@v2"
+        with:
+          coverage: "pcov"
+          php-version: "${{ matrix.php-version }}"
+          ini-values: memory_limit=-1
+
+      - name: Get Composer cache directory
+        id: composer-cache
+        run: echo "::set-output name=dir::$(composer config cache-dir)"
+
+      - name: Cache dependencies
+        uses: actions/cache@v2
+        with:
+          path: ${{ steps.composer-cache.outputs.dir }}
+          key: composer-${{ runner.os }}-${{ matrix.php-version }}-${{ hashFiles('composer.*') }}-${{ matrix.dependencies }}
+          restore-keys: |
+            composer-${{ runner.os }}-${{ matrix.php-version }}-${{ hashFiles('composer.*') }}-
+            composer-${{ runner.os }}-${{ matrix.php-version }}-
+            composer-${{ runner.os }}-
+            composer-
+      - name: "Install lowest dependencies"
+        if: ${{ matrix.dependencies == 'lowest' && matrix.php-version != '8.0' }}
+        run: "composer update --prefer-lowest --no-interaction --no-progress --no-suggest"
+
+      - name: "Install highest dependencies"
+        if: ${{ matrix.dependencies == 'highest' && matrix.php-version != '8.0' }}
+        run: "composer update --no-interaction --no-progress --no-suggest"
+
+      - name: "Install lowest dependencies (ignore-platform-reqs)"
+        if: ${{ matrix.dependencies == 'lowest' && matrix.php-version == '8.0' }}
+        run: "composer update --ignore-platform-reqs --no-interaction --no-progress --no-suggest"
+
+      - name: "Install highest dependencies (ignore-platform-reqs)"
+        if: ${{ matrix.dependencies == 'highest' && matrix.php-version == '8.0' }}
+        run: "composer update --ignore-platform-reqs --no-interaction --no-progress --no-suggest"
+
+      - name: "Tests"
+        run: "vendor/bin/phpunit --coverage-clover=clover.xml --coverage-text"
+