Enhancement: Modernize build automation

.github/workflows/ci.yml

@@ -0,0 +1,90 @@
+# https://help.github.com/en/categories/automating-your-workflow-with-github-actions
+
+on:
+  - "pull_request"
+  - "push"
+
+name: "CI"
+
+jobs:
+  coding-guidelines:
+    name: "Coding Guidelines"
+
+    runs-on: "ubuntu-latest"
+
+    steps:
+      - name: "Checkout"
+        uses: "actions/checkout@v2"
+
+      - name: "Run friendsofphp/php-cs-fixer"
+        run: "php7.3 ./tools/php-cs-fixer fix --diff-format=udiff --dry-run --show-progress=dots --using-cache=no --verbose"
+
+  type-checker:
+    name: "Type Checker"
+
+    runs-on: "ubuntu-latest"
+
+    steps:
+      - name: "Checkout"
+        uses: "actions/checkout@v2"
+
+      - name: "Set COMPOSER_ROOT_VERSION environment variable"
+        uses: "docker://ergebnis/composer-root-version-action:0.1.3"
+
+      - name: "Update dependencies with composer"
+        run: "php7.3 ./tools/composer update --no-ansi --no-interaction --no-progress --no-suggest"
+
+      - name: "Run vimeo/psalm"
+        run: "php7.3 ./tools/psalm --config=psalm.xml --no-progress --shepherd --show-info=false --stats"
+
+  tests:
+    name: "Tests"
+
+    runs-on: "ubuntu-latest"
+
+    strategy:
+      matrix:
+        php-version:
+          - "7.3"
+          - "7.4"
+          - "8.0"
+
+        dependencies:
+          - "lowest"
+          - "highest"
+
+    steps:
+      - name: "Checkout"
+        uses: "actions/checkout@v2"
+
+      - name: "Install PHP with extensions"
+        uses: "shivammathur/setup-php@v1"
+        with:
+          php-version: "${{ matrix.php-version }}"
+          coverage: "pcov"
+
+      - name: "Cache dependencies installed with composer"
+        uses: "actions/cache@v1"
+        with:
+          path: "~/.composer/cache"
+          key: "php${{ matrix.php-version }}-composer-${{ matrix.dependencies }}-${{ hashFiles('**/composer.json') }}"
+          restore-keys: "php${{ matrix.php-version }}-composer-${{ matrix.dependencies }}-"
+
+      - name: "Set COMPOSER_ROOT_VERSION environment variable"
+        uses: "docker://ergebnis/composer-root-version-action:0.1.3"
+
+      - name: "Install lowest dependencies with composer"
+        if: "matrix.dependencies == 'lowest'"
+        run: "./tools/composer update --no-ansi --no-interaction --no-progress --no-suggest --prefer-lowest"
+
+      - name: "Install highest dependencies with composer"
+        if: "matrix.dependencies == 'highest'"
+        run: "./tools/composer update --no-ansi --no-interaction --no-progress --no-suggest"
+
+      - name: "Run tests with phpunit/phpunit"
+        run: "vendor/bin/phpunit --coverage-clover=coverage.xml"
+
+      - name: "Send code coverage report to Codecov.io"
+        env:
+          CODECOV_TOKEN: "${{ secrets.CODECOV_TOKEN }}"
+        run: "bash <(curl -s https://codecov.io/bash) || true"

.gitignore

@@ -1,7 +1,6 @@
-/tests/_files/tmp
-/vendor
-/composer.lock
 /.idea
 /.php_cs
 /.php_cs.cache
 /.phpunit.result.cache
+/composer.lock
+/vendor