Re-add 7.4 (#214)

Author: maennchen

.github/workflows/php.yml

@@ -19,8 +19,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        # Not running PHP 7.2 since the CI is not working and it is EOL in 2 months
-        php: ['8.0', '8.1']
+        php: ['7.4', '8.0', '8.1']
         os: [ubuntu-latest]
         experimental: [false]
         include:

composer.json

@@ -22,14 +22,14 @@
     }
   ],
   "require": {
-    "php": "^8.0",
+    "php": "^7.4 || ^8.0",
     "symfony/polyfill-mbstring": "^1.0",
     "psr/http-message": "^1.0",
     "myclabs/php-enum": "^1.5"
   },
   "require-dev": {
-    "phpunit/phpunit": "^9.4.2",
-    "guzzlehttp/guzzle": "^7.2.0",
+    "phpunit/phpunit": "^8.5.8 || ^9.4.2",
+    "guzzlehttp/guzzle": "^6.5.3 || ^7.2.0",
     "ext-zip": "*",
     "mikey179/vfsstream": "^1.6",
     "vimeo/psalm": "^4.1",