Typescript definition fix (#19)

* Typescript definition fix

- Have already supported predicate function
- Need support function array not only string

* README changed

- Add how to use persistFilter

Author: wenisy

README.md

@@ -45,6 +45,21 @@ const saveAndloadSubsetFilter = createFilter(
   ['three', 'four']
 );
 
+const predicateFilter = persistFilter(
+	'form',
+	[
+		{ path: 'one', filterFunction: (item: any): boolean => item.mustBeStored },
+		{ path: 'two', filterFunction: (item: any): boolean => item.mustBeStored },
+	],
+	'whitelist'
+)
+
+const normalPathFilter = persistFilter(
+	'form',
+	['one', 'two'],
+	'whitelist'
+)
+
 persistStore(store, {
   transforms: [
     saveSubsetFilter,

index.d.ts

@@ -7,7 +7,7 @@ declare module "redux-persist-transform-filter" {
 	export function createFilter<State, Raw>(reducerName: string, inboundPaths?: string[], outboundPaths?: string[], transformType?: TransformType): Transform<State, Raw>;
 	export function createWhitelistFilter<State, Raw>(reducerName: string, inboundPaths?: string[], outboundPaths?: string[]): Transform<State, Raw>;
 	export function createBlacklistFilter<State, Raw>(reducerName: string, inboundPaths?: string[], outboundPaths?: string[]): Transform<State, Raw>;
-	export function persistFilter<State, Raw>(state: State, paths: string[], transformType: TransformType): Transform<State, Raw>;
+	export function persistFilter<State, Raw>(state: State, paths: string[] | { path: string, filterFunction: ((item: any) => boolean) }[], transformType: TransformType): Transform<State, Raw>;
 
 	export default createFilter;
 }