fix: add additional constraint to generic

Author: danielroe

packages/typed-vuex/src/types/getters.ts

@@ -5,7 +5,7 @@ export type GettersTransformer<T extends Record<string, any>> = Readonly<
   { [P in keyof T]: ReturnType<T[P]> }
 >
 
-export const getterTree = <S, T extends GetterTree<StateType<S>, any>>(
+export const getterTree = <S extends Record<string, any>, T extends GetterTree<StateType<S>, any>>(
   _state: S,
   tree: T
 ) => tree

packages/typed-vuex/src/types/mutations.ts

@@ -19,7 +19,7 @@ export interface Commit<T extends Record<string, () => any>> {
   ): ReturnType<T[P]>
 }
 
-export const mutationTree = <S, T extends MutationTree<StateType<S>>>(
+export const mutationTree = <S extends Record<string, any>, T extends MutationTree<StateType<S>>>(
   _state: S,
   tree: T
 ) => tree