ci: Add PHP8 in matrix tests. (#152)

.github/workflows/ci.yml

@@ -8,7 +8,7 @@ jobs:
 
     strategy:
       matrix:
-        php: [7.2, 7.3, 7.4]
+        php: [7.2, 7.3, 7.4, 8.0]
         extension: [':bcmath', ':gmp']
 
     name: PHP ${{ matrix.php }}
@@ -20,7 +20,20 @@ jobs:
         php-version: ${{ matrix.php }}
         coverage: xdebug
         extensions: ${{ matrix.extension }}
-    - run: composer install --prefer-dist --no-interaction
+        tools: composer:v2
+    - name: Install PHP 8 Dependencies
+      uses: nick-invision/retry@v1
+      with:
+        timeout_minutes: 5
+        max_attempts: 5
+        command: composer update --no-interaction --no-progress --ignore-platform-req=php
+      if: "matrix.php >= 8"
+    - name: Install PHP 7 Dependencies
+      uses: nick-invision/retry@v1
+      with:
+        timeout_minutes: 5
+        max_attempts: 5
+        command: composer update --no-interaction --prefer-dist --no-progress
+      if: "matrix.php < 8"
     - run: vendor/bin/phpunit --coverage-text
-    - run: vendor/bin/phpcs --standard=PSR12 --colors -n src tests
 

composer.json

@@ -25,11 +25,11 @@
         }
     ],
     "require": {
-        "php": "^7.2",
+        "php": "^7.2 || ^8.0",
         "ext-mbstring": "*"
     },
     "require-dev": {
-        "phpunit/phpunit": "^8.0",
+        "phpunit/phpunit": "^8.0 || ^9.3",
         "squizlabs/php_codesniffer": "^3.5"
     },
     "suggest": {