fix(types): change MutateOptions return types to void (#4133)

* Docs: Update mutate options description

* fix(types): change MutateOptions return types to void

* fix(types): undo context param type change for mutate onSuccess

* style: run prettier for types

Author: SirMoustache

docs/reference/useMutation.md

@@ -97,7 +97,18 @@ mutate(variables, {
   - `variables: TVariables`
     - Optional
     - The variables object to pass to the `mutationFn`.
-  - Remaining options extend the same options described above in the `useMutation` hook.
+  - `onSuccess: (data: TData, variables: TVariables, context: TContext) => void`
+    - Optional
+    - This function will fire when the mutation is successful and will be passed the mutation's result.
+    - Void function, the returned value will be ignored
+  - `onError: (err: TError, variables: TVariables, context: TContext | undefined) => void`
+    - Optional
+    - This function will fire if the mutation encounters an error and will be passed the error.
+    - Void function, the returned value will be ignored
+  - `onSettled: (data: TData | undefined, error: TError | null, variables: TVariables, context: TContext | undefined) => void`
+    - Optional
+    - This function will fire when the mutation is either successfully fetched or encounters an error and be passed either the data or error
+    - Void function, the returned value will be ignored
   - If you make multiple requests, `onSuccess` will fire only after the latest call you've made.
 - `mutateAsync: (variables: TVariables, { onSuccess, onSettled, onError }) => Promise<TData>`
   - Similar to `mutate` but returns a promise which can be awaited.

packages/query-core/src/types.ts

@@ -576,22 +576,18 @@ export interface MutateOptions<
   TVariables = void,
   TContext = unknown,
 > {
-  onSuccess?: (
-    data: TData,
-    variables: TVariables,
-    context: TContext,
-  ) => Promise<unknown> | unknown
+  onSuccess?: (data: TData, variables: TVariables, context: TContext) => void
   onError?: (
     error: TError,
     variables: TVariables,
     context: TContext | undefined,
-  ) => Promise<unknown> | unknown
+  ) => void
   onSettled?: (
     data: TData | undefined,
     error: TError | null,
     variables: TVariables,
     context: TContext | undefined,
-  ) => Promise<unknown> | unknown
+  ) => void
 }
 
 export type MutateFunction<