types: omit async & sync method after QuansyncFn#bind (#15)

* feat: enable `bind this` feature

* types: fix the type of the `QuansyncFn.bind`

* test: enhance the test case for the `bind this` scenario

* type: enhance the `bind` type of the `QuansyncFn`

* tests: remove the unnecessary tests

* chore: remove the unnecessary codes

* docs: add the annotations for the special `bind` type

* refactor

---------

Co-authored-by: 三咲智子 Kevin Deng <[email protected]>

Author: wangziling

src/types.ts

@@ -27,6 +27,15 @@ export type QuansyncAwaitableGenerator<Return = any, Yield = unknown> =
 export type QuansyncFn<Return = any, Args extends any[] = []> =
   ((...args: Args) => QuansyncAwaitableGenerator<Return>)
   & {
+    /**
+     * **Warning**: The `async` and `sync` methods will be lost after invoked.
+     */
+    bind: <T, A extends any[], B extends any[]>(
+      this: (this: T, ...args: [...A, ...B]) => QuansyncAwaitableGenerator<Return>,
+      thisArg: T,
+      ...args: A
+    ) => ((...args: B) => QuansyncAwaitableGenerator<Return>)
+
     sync: (...args: Args) => Return
     async: (...args: Args) => Promise<Return>
   }