updated project style guidelines

lib/model/endpointData.dart

@@ -23,17 +23,13 @@ class Endpoint {
 
   Endpoint({required this.domain, this.path = ''});
 
-  String full() {
-    return domain + path;
-  }
+  String full() => domain + path;
 }
 
 class EndpointData {
   static final EndpointData _instance = EndpointData._construct();
 
-  factory EndpointData() {
-    return _instance;
-  }
+  factory EndpointData() => _instance;
 
   EndpointData._construct();
 
@@ -43,8 +39,7 @@ class EndpointData {
     return existingName.startsWith('google') ? EndpointMode.stage : EndpointMode.live;
   }
 
-  Endpoint webuntis() {
-    return EndpointOptions(
+  Endpoint webuntis() => EndpointOptions(
       live: Endpoint(
         domain: 'peleus.webuntis.com',
       ),
@@ -53,10 +48,8 @@ class EndpointData {
         path: '/marianum/marianummobile/webuntis/public/index.php/api'
       ),
     ).get(getEndpointMode());
-  }
 
-  Endpoint nextcloud() {
-    return EndpointOptions(
+  Endpoint nextcloud() => EndpointOptions(
       live: Endpoint(
         domain: 'cloud.marianum-fulda.de',
       ),
@@ -65,6 +58,5 @@ class EndpointData {
         path: '/marianum/marianummobile/cloud',
       )
     ).get(getEndpointMode());
-  }
 
-}
+}