Add CI procedure

.github/workflows/ci.yaml

@@ -0,0 +1,61 @@
+# yamllint disable rule:line-length
+# yamllint disable rule:braces
+name: CI
+
+on:
+  pull_request:
+  push:
+    branches:
+      - main
+      - master
+
+jobs:
+  tests:
+    name: Testing with PHP ${{ matrix.php-version }} ${{ matrix.description }}
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        php-version:
+          - '7.0'
+          - '7.1'
+          - '7.2'
+          - '7.3'
+          - '7.4'
+          - '8.0'
+          - '8.1'
+        coverage: ['none']
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php-version }}
+          coverage: ${{ matrix.coverage }}
+          tools: composer:v2
+          ini-values: date.timezone='UTC'
+
+      - name: Get composer cache directory
+        id: composer-cache
+        run: echo "::set-output name=dir::$(composer config cache-files-dir)"
+
+      - name: Cache dependencies
+        uses: actions/cache@v2
+        with:
+          path: ${{ steps.composer-cache.outputs.dir }}
+          key: composer-${{ matrix.php-version }}-${{ hashFiles('composer.*') }}
+          restore-keys: |
+            composer-${{ matrix.php-version }}-
+            composer-
+
+      - name: Install dependencies
+        run: |
+          composer install --prefer-dist --no-interaction --no-progress
+
+      - name: Run tests
+        run: |
+          php vendor/bin/phpunit test/TCFv2/
+          php vendor/bin/phpunit test/TCFv1/

composer.json

@@ -16,9 +16,12 @@
         }
     ],
     "require": {
-        "php": "^7.0|^8.0",
+        "php": ">=7.0",
         "ext-json": "*"
     },
+    "require-dev": {
+        "phpunit/phpunit": ">=8"
+    }
     "autoload": {
         "psr-4": {
             "IABTcf\\": "src/"