fixed grammar mistakes

src/endpoints/movies.ts

@@ -2,7 +2,7 @@ import { BaseEndpoint } from './base';
 import {
   AlternativeTitles,
   AppendToResponse,
-  AppendToResponseMovieKeys,
+  AppendToResponseMovieKey,
   ChangeOptions,
   Changes,
   Credits,
@@ -35,7 +35,7 @@ export class MoviesEndpoint extends BaseEndpoint {
     super(accessToken);
   }
 
-  async details<T extends AppendToResponseMovieKeys[] | undefined>(
+  async details<T extends AppendToResponseMovieKey[] | undefined>(
     id: number,
     appendToResponse?: T
   ) {

src/endpoints/people.ts

@@ -1,6 +1,6 @@
 import {
   AppendToResponse,
-  AppendToResponsePersonKeys,
+  AppendToResponsePersonKey,
   ChangeOptions,
   ExternalIds,
   PageOption,
@@ -23,7 +23,7 @@ export class PeopleEndpoint extends BaseEndpoint {
     super(accessToken);
   }
 
-  async details<T extends AppendToResponsePersonKeys[] | undefined>(
+  async details<T extends AppendToResponsePersonKey[] | undefined>(
     id: number,
     appendToResponse?: T
   ) {

src/endpoints/tv-shows.ts

@@ -2,7 +2,7 @@ import { BaseEndpoint } from './base';
 import {
   AlternativeTitles,
   AppendToResponse,
-  AppendToResponseTvKeys,
+  AppendToResponseTvKey,
   ChangeOptions,
   Changes,
   ContentRatings,
@@ -37,7 +37,7 @@ export class TvShowsEndpoint extends BaseEndpoint {
     super(accessToken);
   }
 
-  async details<T extends AppendToResponseTvKeys[] | undefined>(
+  async details<T extends AppendToResponseTvKey[] | undefined>(
     id: number,
     appendToResponse?: T
   ) {