fix: convert types.d.ts to types.ts

definition types does not exist in the build and cause Reducer type to be any

closes #5

src/create-handler-map.ts

@@ -1,6 +1,7 @@
 import { ActionCreator } from './create-action'
 import { AnyAction } from './action'
 import { getType } from './get-type'
+import { Reducer } from './types'
 
 export type HandlerMap<State, Actions extends AnyAction> = {
   [key in Actions['type']]: Reducer<State, Actions>

src/types.ts

@@ -0,0 +1,4 @@
+export type Reducer<State, Actions> = (
+  prevState: State,
+  action: Actions
+) => State

tsconfig.build.json

@@ -1,6 +1,6 @@
 {
   "extends": "./tsconfig.json",
-  "files": ["./src/index.ts", "./src/types.d.ts"],
+  "files": ["./src/index.ts"],
   "include": [],
   "exclude": [],
   "compilerOptions": {

tsconfig.spec.json

@@ -1,6 +1,6 @@
 {
   "extends": "./tsconfig.json",
-  "include": ["./src/**/__tests__/*", "./src/types.d.ts"],
+  "include": ["./src/**/__tests__/*"],
   "compilerOptions": {
     "target": "esnext",
     "esModuleInterop": true