refactor: replace NativeScriptModule with NativeScriptCommonModule

NativeScriptModule should be imported only in the root NgModule. For all
other feature modules, NativeScriptCommonModule should be used instead.
Check out NativeScript/nativescript-angular#1196.

Author: sis0k0

Diff for: app/groceries/groceries.module.ts

@@ -1,4 +1,4 @@
-import { NativeScriptModule } from "nativescript-angular/nativescript.module";
+import { NativeScriptCommonModule } from "nativescript-angular/common";
 import { NativeScriptFormsModule } from "nativescript-angular/forms";
 import { NgModule, NO_ERRORS_SCHEMA } from "@angular/core";
 import { groceriesRouting } from "./groceries.routing";
@@ -8,9 +8,9 @@ import { ItemStatusPipe } from "./grocery-list/item-status.pipe";
 
 @NgModule({
   imports: [
-    NativeScriptModule,
     NativeScriptFormsModule,
-    groceriesRouting
+    NativeScriptCommonModule,
+    groceriesRouting,
   ],
   declarations: [
     GroceriesComponent,

Diff for: app/login/login.module.ts

@@ -1,4 +1,4 @@
-import { NativeScriptModule } from "nativescript-angular/nativescript.module";
+import { NativeScriptCommonModule } from "nativescript-angular/common";
 import { NativeScriptFormsModule } from "nativescript-angular/forms";
 import { NgModule, NO_ERRORS_SCHEMA } from "@angular/core";
 
@@ -7,9 +7,9 @@ import { LoginComponent } from "./login.component";
 
 @NgModule({
   imports: [
-    NativeScriptModule,
     NativeScriptFormsModule,
-    loginRouting
+    NativeScriptCommonModule,
+    loginRouting,
   ],
   declarations: [
     LoginComponent