chore: update php dependencies

fix #116

composer.json

@@ -10,14 +10,14 @@
         }
     ],
     "require": {
-        "littleredbutton/bigbluebutton-api-php": "^3.0"
+        "littleredbutton/bigbluebutton-api-php": "^4.0"
     },
     "require-dev": {
         "phpunit/phpunit": "^8.5 || ^9.3",
         "friendsofphp/php-cs-fixer": "^2.16",
-        "nextcloud/coding-standard": "^0.3.0",
+        "nextcloud/coding-standard": "^0.5.0",
         "phpstan/phpstan": "^0.12.29",
-        "christophwurst/nextcloud": "^20.0",
+        "christophwurst/nextcloud": "^21.0",
         "vimeo/psalm": "^4.5"
     },
     "config": {
@@ -33,4 +33,4 @@
         "psalm:clear": "psalm --clear-cache && psalm --clear-global-cache",
         "psalm:fix": "psalm --alter --issues=InvalidReturnType,InvalidNullableReturnType,MissingParamType,InvalidFalsableReturnType"
     }
-}
+}