Migrate to GH actions, add phpstan

.github/workflows/continuous-integration.yml

@@ -0,0 +1,69 @@
+name: "Continuous Integration"
+
+on:
+  - push
+  - pull_request
+
+env:
+  COMPOSER_FLAGS: "--ansi --no-interaction --no-progress --prefer-dist"
+
+jobs:
+  tests:
+    name: "CI"
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        php-version:
+          - "5.3"
+          - "5.4"
+          - "5.5"
+          - "5.6"
+          - "7.0"
+          - "7.1"
+          - "7.2"
+          - "7.3"
+          - "7.4"
+          - "8.0"
+          # disabled for now as it leads to PHPUnit installing in a very old 4.3 version due to phpspec/prophecy not allowing 8.1
+          # - "8.1"
+
+    steps:
+      - name: "Checkout"
+        uses: "actions/checkout@v2"
+
+      - name: "Install PHP 5"
+        if: "startsWith(matrix.php-version, '5.')"
+        uses: "shivammathur/setup-php@v2"
+        with:
+          coverage: "none"
+          php-version: "${{ matrix.php-version }}"
+          extensions: "mongo"
+
+      - name: "Install PHP 7+"
+        if: "!startsWith(matrix.php-version, '5.')"
+        uses: "shivammathur/setup-php@v2"
+        with:
+          coverage: "none"
+          php-version: "${{ matrix.php-version }}"
+
+      - name: Get composer cache directory
+        id: composercache
+        run: echo "::set-output name=dir::$(composer config cache-files-dir)"
+
+      - name: Cache dependencies
+        uses: actions/cache@v2
+        with:
+          path: ${{ steps.composercache.outputs.dir }}
+          key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.json') }}
+          restore-keys: ${{ runner.os }}-composer-
+
+      - name: "Install latest dependencies"
+        run: |
+          # Remove PHPStan as it requires a newer PHP
+          composer remove phpstan/phpstan --dev --no-update
+          composer update ${{ env.COMPOSER_FLAGS }}
+
+      - name: "Run tests"
+        run: "composer test"

.github/workflows/lint.yml

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+name: "PHP Lint"
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  tests:
+    name: "Lint"
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        php-version:
+          - "5.3"
+          - "8.0"
+
+    steps:
+      - name: "Checkout"
+        uses: "actions/checkout@v2"
+
+      - name: "Install PHP"
+        uses: "shivammathur/setup-php@v2"
+        with:
+          coverage: "none"
+          extensions: "intl"
+          ini-values: "memory_limit=-1"
+          php-version: "${{ matrix.php-version }}"
+
+      - name: "Lint PHP files on 5.3"
+        if: "matrix.php-version == '5.3'"
+        run: "find src/ -type f -name '*.php' -exclude '*Trait.php' -print0 | xargs -0 -L1 -P4 -- php -l -f"
+
+      - name: "Lint PHP files"
+        if: "matrix.php-version != '5.3'"
+        run: "find src/ -type f -name '*.php' -print0 | xargs -0 -L1 -P4 -- php -l -f"

.github/workflows/phpstan.yml

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+name: "PHPStan"
+
+on:
+  - push
+  - pull_request
+
+env:
+  COMPOSER_FLAGS: "--ansi --no-interaction --no-progress --prefer-dist"
+
+jobs:
+  tests:
+    name: "PHPStan"
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        php-version:
+          - "8.0"
+
+    steps:
+      - name: "Checkout"
+        uses: "actions/checkout@v2"
+
+      - name: "Install PHP"
+        uses: "shivammathur/setup-php@v2"
+        with:
+          coverage: "none"
+          php-version: "${{ matrix.php-version }}"
+
+      - name: Get composer cache directory
+        id: composercache
+        run: echo "::set-output name=dir::$(composer config cache-files-dir)"
+
+      - name: Cache dependencies
+        uses: actions/cache@v2
+        with:
+          path: ${{ steps.composercache.outputs.dir }}
+          key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.json') }}
+          restore-keys: ${{ runner.os }}-composer-
+
+      - name: "Install latest dependencies"
+        run: "composer update ${{ env.COMPOSER_FLAGS }}"
+
+      - name: Run PHPStan
+        run: composer phpstan