Fix angular example (pubkey#3957)

* Primary key must have set maxLength

* Fix PL1 error

Author: jeromepochat

examples/angular/src/app/schemas/hero.schema.ts

@@ -13,7 +13,8 @@ export const HERO_SCHEMA_LITERAL = {
     properties: {
         name: {
             type: 'string',
-            default: ''
+            default: '',
+            maxLength: 100
         },
         color: {
             type: 'string',

examples/angular/src/app/services/database.service.ts

@@ -94,7 +94,7 @@ async function loadRxDBPlugins(): Promise<void> {
             // add dev-mode plugin
             // which does many checks and add full error-messages
             import('rxdb/plugins/dev-mode').then(
-                module => addRxPlugin(module as any)
+                module => addRxPlugin(module.RxDBDevModePlugin)
             )
         ]);
     } else { }