Add Github actions integration

Author: lisachenko

.github/workflows/phpunit.yml

@@ -0,0 +1,57 @@
+name: "PHPUnit tests"
+
+on:
+  push:
+
+jobs:
+  phpunit:
+    name: "PHPUnit tests"
+
+    runs-on: ${{ matrix.operating-system }}
+
+    strategy:
+      matrix:
+        dependencies:
+          - "lowest"
+          - "highest"
+        php-version:
+          - "7.4"
+          - "8.0"
+        operating-system:
+          - "ubuntu-latest"
+
+    steps:
+      - name: "Checkout"
+        uses: "actions/checkout@v2"
+
+      - name: "Install PHP"
+        uses: "shivammathur/setup-php@v2"
+        with:
+          coverage: "xdebug"
+          php-version: "${{ matrix.php-version }}"
+          ini-values: memory_limit=-1
+          tools: composer:v2, cs2pr
+
+      - name: "Cache dependencies"
+        uses: "actions/cache@v2"
+        with:
+          path: |
+            ~/.composer/cache
+            vendor
+          key: "php-${{ matrix.php-version }}-${{ matrix.dependencies }}"
+          restore-keys: "php-${{ matrix.php-version }}-${{ matrix.dependencies }}"
+
+      - name: "Install lowest dependencies"
+        if: ${{ matrix.dependencies == 'lowest' }}
+        run: "composer update --prefer-lowest --no-interaction --no-progress --no-suggest"
+
+      - name: "Install highest dependencies"
+        if: ${{ matrix.dependencies == 'highest' }}
+        run: "composer update --no-interaction --no-progress --no-suggest"
+
+      - name: "Install locked dependencies"
+        if: ${{ matrix.dependencies == 'locked' }}
+        run: "composer install --no-interaction --no-progress --no-suggest"
+
+      - name: "Tests"
+        run: "XDEBUG_MODE=coverage vendor/bin/phpunit"

composer.json

@@ -12,10 +12,10 @@
     "minimum-stability": "stable",
     "require": {
         "php": "^7.4|^8.0",
-        "lisachenko/z-engine": "^0.7|^0.9"
+        "lisachenko/z-engine": "^0.8.1|^0.9.1"
     },
     "require-dev": {
-        "phpunit/phpunit": "^8.5|^9.5"
+        "phpunit/phpunit": "^9.5.5"
     },
     "autoload": {
         "psr-4": {