added plugin screen (#671)

composer.json

@@ -3,6 +3,12 @@
     "license": "MIT",
     "type": "project",
     "description": "Kimai Time-Tracking 2",
+    "authors": [
+        {
+            "name": "Kevin Papst",
+            "homepage": "https://www.kevinpapst.de"
+        }
+    ],
     "require": {
         "php": "^7.1.3",
         "ext-gd": "*",
@@ -56,7 +62,6 @@
     "require-dev": {
         "friendsofphp/php-cs-fixer": "^2.10",
         "phpunit/phpunit": "^7.0",
-        "squizlabs/php_codesniffer": "^3.2",
         "symfony/browser-kit": "^4.0",
         "symfony/css-selector": "^4.0",
         "symfony/phpunit-bridge": "^4.0",