Merge pull request #7 from Codeception/php8

Support PHP 8

Author: Naktibalda

.github/workflows/main.yml

@@ -8,7 +8,7 @@ jobs:
 
     strategy:
       matrix:
-        php: [5.6, 7.0, 7.1, 7.2, 7.3, 7.4]
+        php: [5.6, 7.0, 7.1, 7.2, 7.3, 7.4, 8.0]
 
     steps:
     - name: Checkout code

Robofile.php

@@ -15,14 +15,13 @@
     ],
     "minimum-stability": "RC",
     "require": {
-        "php": ">=5.6.0 <8.0",
-        "guzzlehttp/guzzle": "^6.3.0|^7.0.0",
-        "codeception/lib-innerbrowser": "^1.3.2",
-        "codeception/codeception": "*@dev"
+        "php": ">=5.6.0 <9.0",
+        "guzzlehttp/guzzle": "^6.3|^7.0",
+        "codeception/lib-innerbrowser": "^1.3",
+        "codeception/codeception": "^4.0"
     },
     "require-dev": {
-        "codeception/util-robohelpers": "dev-master",
-        "codeception/module-rest": "dev-master | ^1.0"
+        "codeception/module-rest": "^1.0"
     },
     "conflict": {
         "codeception/codeception": "<4.0"