fix for import ngxs on theme-shared and added @Injectable on theme-basic states as required on angular9

npm/ng-packs/packages/theme-basic/src/lib/states/layout.state.ts

@@ -1,3 +1,4 @@
+import { Injectable } from '@angular/core';
 import { Action, Selector, State, StateContext } from '@ngxs/store';
 import snq from 'snq';
 import { AddNavigationElement, RemoveNavigationElementByName } from '../actions/layout.actions';
@@ -7,6 +8,7 @@ import { Layout } from '../models/layout';
   name: 'LayoutState',
   defaults: { navigationElements: [] } as Layout.State,
 })
+@Injectable()
 export class LayoutState {
   @Selector()
   static getNavigationElements({ navigationElements }: Layout.State): Layout.NavigationElement[] {

npm/ng-packs/packages/theme-shared/src/lib/theme-shared.module.ts

@@ -25,6 +25,7 @@ import { chartJsLoaded$ } from './utils/widget-utils';
 import { PaginationComponent } from './components/pagination/pagination.component';
 import { LoadingComponent } from './components/loading/loading.component';
 import { LoadingDirective } from './directives/loading.directive';
+import { NgxsModule } from '@ngxs/store';
 
 export function appendScript(injector: Injector) {
   const fn = () => {
@@ -38,7 +39,11 @@ export function appendScript(injector: Injector) {
 }
 
 @NgModule({
-  imports: [CoreModule, NgxValidateCoreModule],
+  imports: [
+    CoreModule,
+    NgxValidateCoreModule,
+    NgxsModule.forRoot([])
+  ],
   declarations: [
     BreadcrumbComponent,
     ButtonComponent,