Add support for PHP 8

Author: alcaeus

.github/workflows/continuous-integration.yml

@@ -30,6 +30,8 @@ jobs:
         include:
           - deps: "low"
             php-version: "7.2"
+          - deps: "dev"
+            php-version: "8.0"
 
     steps:
       - name: "Checkout"
@@ -51,14 +53,13 @@ jobs:
           key: "php-${{ matrix.php-version }}-composer-locked-${{ hashFiles('composer.lock') }}"
           restore-keys: "php-${{ matrix.php-version }}-composer-locked-"
 
-      # to be removed when doctrine/orm adds support for PHP 8
-      - name: "Pretend this is PHP 7.4"
-        run: "composer config platform.php 7.4.99"
-        if: "${{ matrix.php-version == '8.0' }}"
+      - name: "Allow installing dev dependencies"
+        run: "composer config minimum-stability dev"
+        if: "${{ matrix.deps == 'dev' }}"
 
       - name: "Install dependencies with composer"
         run: "composer update --no-interaction --prefer-dist"
-        if: "${{ matrix.deps == 'normal' }}"
+        if: "${{ matrix.deps != 'low' }}"
 
       - name: "Install lowest possible dependencies with composer"
         run: "composer update --no-interaction --prefer-dist --prefer-lowest"

composer.json

@@ -20,7 +20,7 @@
         }
     ],
     "require": {
-        "php": "^7.2",
+        "php": "^7.2|^8.0",
         "symfony/framework-bundle": "~3.4|~4.0|~5.0",
         "doctrine/doctrine-bundle": "~1.0|~2.0",
         "doctrine/migrations": "~3.0"
@@ -43,11 +43,6 @@
     "autoload-dev": {
         "psr-4": { "Doctrine\\Bundle\\MigrationsBundle\\Tests\\": "Tests" }
     },
-    "config": {
-        "platform": {
-            "php": "7.2.5"
-        }
-    },
     "extra": {
         "branch-alias": {
           "dev-master": "3.0.x-dev"