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

Fixes: #1216

src/app/clients/clients-view/documents-tab/documents-tab.component.ts

@@ -1,7 +1,7 @@
 import { Component, OnInit, ViewChild } from '@angular/core';
 import { ActivatedRoute } from '@angular/router';
 import { MatTable } from '@angular/material/table';
-import { MatDialog } from '@angular/material';
+import { MatDialog } from '@angular/material/dialog';
 
 /** Custom Services */
 import { ClientsService } from '../../clients.service';
@@ -17,7 +17,7 @@ import { DeleteDialogComponent } from '../../../shared/delete-dialog/delete-dial
   styleUrls: ['./documents-tab.component.scss']
 })
 export class DocumentsTabComponent implements OnInit {
-  @ViewChild('documentsTable') documentsTable: MatTable<Element>;
+  @ViewChild('documentsTable', { static: true }) documentsTable: MatTable<Element>;
   documentsColumns: string[] = ['name', 'description', 'fileName', 'actions'];
   clientDocuments: any;
   clientId: string;