Fixed CI on PHP 8

Author: GrahamCampbell

.github/workflows/tests.yml

@@ -34,6 +34,22 @@ jobs:
           max_attempts: 5
           command: composer update --no-interaction --no-progress
 
+      - name: Remove Guzzle 6
+        uses: nick-invision/retry@v1
+        with:
+          timeout_minutes: 5
+          max_attempts: 5
+          command: composer remove php-http/guzzle6-adapter --dev --no-update --no-interaction
+        if: matrix.php >= 8
+
+      - name: Install Guzzle 7
+        uses: nick-invision/retry@v1
+        with:
+          timeout_minutes: 5
+          max_attempts: 5
+          command: composer require php-http/guzzle7-adapter --dev --no-update --no-interaction
+        if: matrix.php >= 8
+
       - name: Install PHPUnit
         uses: nick-invision/retry@v1
         with:

composer.json

@@ -41,8 +41,8 @@
     "require-dev": {
         "bamarni/composer-bin-plugin": "^1.4.1",
         "guzzlehttp/psr7": "^1.7",
-        "php-http/guzzle6-adapter": "^2.0.1",
-        "http-interop/http-factory-guzzle": "^1.0"
+        "http-interop/http-factory-guzzle": "^1.0",
+        "php-http/guzzle6-adapter": "^2.0.1"
     },
     "autoload": {
         "psr-4": {