refactor: optimize plugins for angular treeshaking

BREAKING CHANGE: You can remove the plugin import from the app.module.ts because of the changed Inject decorator

src/@ionic-native/plugins/firebase-dynamic-links/index.ts

@@ -56,7 +56,9 @@ export interface IDynamicLink {
   installVariables: ['APP_DOMAIN', 'APP_PATH'],
   platforms: ['Android', 'iOS']
 })
-@Injectable()
+@Injectable({
+  providedIn: 'root'
+})
 export class FirebaseDynamicLinks extends IonicNativePlugin {
   /**
    * Registers callback that is triggered on each dynamic link click.