fix: typing of toDTO()

Author: ProGM

dist/types/Model.d.ts

@@ -2,7 +2,7 @@ import { DTO } from "./interfaces";
 export declare class Model {
     id: string;
     _type: string;
-    toDTO<T extends Model = typeof this>(): DTO<T>;
+    toDTO(): DTO<this>;
     toJSON(maxDepth?: number): any;
     toFormData(): FormData;
 }

src/Model.ts

@@ -5,7 +5,7 @@ export class Model {
   id!: string;
   _type!: string;
 
-  toDTO<T extends Model = typeof this>(): DTO<T> {
+  toDTO(): DTO<this> {
     const response: any = { ...this };
     delete response._type;