Fix null and non submodules objects properties in state

Author: Aymeric MASSE

dist/proxy.js

@@ -298,7 +298,7 @@ function createGettersAndMutationProxyFromState({ cls, proxy, state, $store, nam
     if (currentField.length && !currentField.endsWith(".")) currentField += ".";
     const path = currentField + field;
 
-    if ( maxDepth === 0 || typeof value !== "object" ) {
+    if ( maxDepth === 0 || typeof value !== "object" || (typeof value === 'object' && !fieldIsSubmodule) ) {
 
       if( !strict || fieldIsSubmodule ) {
 

dist/proxy.js.map

@@ -3,7 +3,8 @@ import { extractVuexModule } from "./module";
 import { toCamelCase, getClassPath } from "./utils"
 
 export function isFieldASubModule( instance :VuexModule & Map, field :string ) {
-  return( 
+  return(
+    instance[ field ] != null &&
     typeof instance[ field ] === "object" && 
     instance[ field ][ "__submodule_type__" ] === "submodule" 
   )