ci: switch from travisci to github actions

Author: domtra

.github/workflows/main.yml

@@ -0,0 +1,40 @@
+name: Run PHP tests
+
+on:
+  push:
+    branches: [ "master" ]
+  pull_request:
+    branches: [ "master" ]
+
+permissions:
+  contents: read
+
+jobs:
+  run-test:
+    runs-on: ubuntu-22.04
+
+    strategy:
+      matrix:
+        php: [7.4, 8.0, 8.1, 8.2, 8.3]
+        dependency-version: [prefer-lowest, prefer-stable]
+
+    name: PHP${{ matrix.php }}_${{ matrix.dependency-version }}
+
+    steps:
+    - uses: actions/checkout@v3
+
+    - uses: shivammathur/setup-php@v2
+      with:
+          php-version: ${{ matrix.php }}
+          coverage: xdebug
+
+    - name: Install dependencies
+      run: composer update --${{ matrix.dependency-version }} --prefer-dist --no-interaction --no-suggest
+
+    - name: Check coding style
+      run: vendor/bin/phpcs -s --standard=phpcs.ruleset.xml .
+
+    - name: Execute tests
+      run: vendor/bin/phpunit
+
+    # TODO: add codecoverage // vendor/bin/phpunit --coverage-clover logs/clover.xml