allow v3 and v4 of vlucas/phpdotenv

Author: TavoNiievez

composer.json

@@ -23,7 +23,7 @@
         "codeception/module-phpbrowser": "^1.0",
         "codeception/module-rest": "^1.2",
         "codeception/module-sequence": "^1.0",
-        "vlucas/phpdotenv": "^4.1"
+        "vlucas/phpdotenv": "^3.6 | ^4.1"
     },
     "autoload":{
         "classmap": ["src/"]