fix param/body for add, delete

models/Tag.ts

@@ -3,7 +3,7 @@ import Assignment       from './Assignment';
 import Exercise         from './Exercise';
 
 
-interface Tag {
+interface Tags {
     name: string;
     type: 'Language' | 'Framework' | 'Theme' | 'UserDefined';
 
@@ -13,5 +13,5 @@ interface Tag {
     correctionCommit: CommitSchema | undefined;
 }
 
-export default Tag;
+export default Tags;
 	
\ No newline at end of file

types/Dojo/ApiRoute.ts

@@ -13,9 +13,9 @@ enum ApiRoute {
     EXERCISE_ASSIGNMENT          = '/exercises/{{id}}/assignment',
     EXERCISE_RESULTS             = '/exercises/{{id}}/results',
     ADD_TAG                      = '/tags',
-    DELETE_TAG                   = '/tags/{tagid}',
-    PROPOSE_TAG                  = '/tags/proposals',
-    ANSWER_TAG_PROPOSAL          = '/tags/proposals/{tagProposalName}'
+    DELETE_TAG                   = '/tags/{{tageName}}',
+    PROPOSE_TAG                  = '/tags/proposals/{{state}}',
+    ANSWER_TAG_PROPOSAL          = '/tags/proposals/{{tagProposalName}}'
 }