Support PHP version 8.0

Author: tlsvda

.github/workflows/test.yaml

@@ -2,7 +2,7 @@ name: Test
 on: push
 
 jobs:
-  test:
+  test-php7_2:
     runs-on: ubuntu-18.04
     strategy:
       matrix:
@@ -31,3 +31,32 @@ jobs:
 
       - name: Run tests
         run: make check
+  test-php8:
+    runs-on: ubuntu-18.04
+    strategy:
+      matrix:
+        prefer: [ "prefer-stable", "prefer-lowest" ]
+    steps:
+      - name: checkout
+        uses: actions/checkout@v2
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: '8.0'
+          tools: composer:v2
+
+      - name: Get Composer Cache Directory
+        id: composer-cache
+        run: |
+          echo "::set-output name=dir::$(composer config cache-files-dir)"
+      - uses: actions/cache@v2
+        with:
+          path: ${{ steps.composer-cache.outputs.dir }}
+          key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}-${{ matrix.prefer }}-
+          restore-keys: ${{ runner.os }}-composer-${{ matrix.prefer }}-
+      - name: Composer Install
+        run: composer update --${{ matrix.prefer }} --no-interaction --no-progress --no-ansi
+
+      - name: Run tests
+        run: make check

composer.json

@@ -10,7 +10,7 @@
         }
     ],
     "require": {
-        "php": "^7.2",
+        "php": "^7.2||^8.0",
         "dealerdirect/phpcodesniffer-composer-installer": "^0.7.0",
         "escapestudios/symfony2-coding-standard": "^3.6",
         "phpmd/phpmd": "^2.9",