Merge pull request #234 from remcohaszing/fix-argument-types

Fix Mapping type unrelated to recursive Value type

index.d.ts

@@ -9,7 +9,7 @@
 //   Marvin Hagemeister <https://github.com/marvinhagemeister>
 
 export type Value = string | number | boolean | undefined | null;
-export type Mapping = { [key: string]: Value };
+export type Mapping = { [key: string]: any };
 export type Argument = Value | Mapping | Argument[];
 
 export default function classNames(...args: Argument[]): string;