build: update to angular-v9.1.12 (#1215)

Fixes: #1216

src/app/groups/groups-view/notes-tab/notes-tab.component.ts

@@ -2,7 +2,7 @@
 import { Component, OnInit, ViewChild } from '@angular/core';
 import { ActivatedRoute } from '@angular/router';
 import { FormGroup, FormBuilder, Validators } from '@angular/forms';
-import { MatDialog } from '@angular/material';
+import { MatDialog } from '@angular/material/dialog';
 
 /** Custom Services */
 import { AuthenticationService } from '../../../core/authentication/authentication.service';
@@ -36,7 +36,7 @@ export class NotesTabComponent implements OnInit {
   noteForm: FormGroup;
 
   /** Note Form Reference */
-  @ViewChild('formRef') formRef: any;
+  @ViewChild('formRef', { static: true }) formRef: any;
 
   /**
    * Fetches notes data from `resolve`