feat(overmind): add json function to deep copy objects for 3rd parties

Author: christianalfoni

packages/node_modules/overmind/src/index.ts

@@ -76,6 +76,9 @@ export const MODE_DEFAULT = Symbol('MODE_DEFAULT')
 export const MODE_TEST = Symbol('MODE_TEST')
 export const MODE_SSR = Symbol('MODE_SSR')
 
+export const json = (obj: any) =>
+  deepCopy(obj && obj[IS_PROXY] ? obj[VALUE] : obj)
+
 export interface OvermindSSR<Config extends IConfiguration>
   extends Overmind<Config> {
   hydrate(): IMutation[]