fix: typings of Mutation

Author: js2me

.changeset/dry-singers-serve.md

@@ -0,0 +1,5 @@
+---
+"mobx-tanstack-query": patch
+---
+
+fixed typings of `mutationFn` (second argument)

src/mutation.types.ts

@@ -59,7 +59,7 @@ export type MobxMutationInvalidateQueriesOptions =
 
 export type MutationFn<TData = unknown, TVariables = unknown> = (
   variables: TVariables,
-  options: { signal: AbortSignal },
+  context: MutationFunctionContext,
 ) => Promise<TData>;
 
 /**