fix(overmind): just a typing issue

Author: christianalfoni

packages/node_modules/overmind/src/internalTypes.ts

@@ -152,7 +152,7 @@ export interface Events {
 // ============= PRIVATE TYPES FOR APP
 
 export type ResolveState<State extends IState | null> = State extends undefined
-  ? {}
+  ? State
   : {
       [P in keyof State]: State[P] extends (parent: ResolveState<IState>, root: any) => any
         ? ReturnType<State[P]>