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

Fixes: #1216

src/app/organization/holidays/holidays.component.ts

@@ -1,6 +1,8 @@
 /** Angular Imports */
 import { Component, OnInit, ViewChild } from '@angular/core';
-import { MatTableDataSource, MatPaginator, MatSort } from '@angular/material';
+import { MatPaginator } from '@angular/material/paginator';
+import { MatSort } from '@angular/material/sort';
+import { MatTableDataSource } from '@angular/material/table';
 import { ActivatedRoute } from '@angular/router';
 import { FormControl } from '@angular/forms';
 
@@ -32,9 +34,9 @@ export class HolidaysComponent implements OnInit {
   dataSource: MatTableDataSource<any>;
 
   /** Paginator for holidays table. */
-  @ViewChild(MatPaginator) paginator: MatPaginator;
+  @ViewChild(MatPaginator, { static: true }) paginator: MatPaginator;
   /** Sorter for holidays table. */
-  @ViewChild(MatSort) sort: MatSort;
+  @ViewChild(MatSort, { static: true }) sort: MatSort;
 
   /**
    * Retrieves the offices data from `resolve`.

src/app/organization/holidays/view-holidays/view-holidays.component.ts

@@ -1,7 +1,7 @@
 /** Angular Imports. */
 import { Component } from '@angular/core';
 import { ActivatedRoute, Router } from '@angular/router';
-import { MatDialog } from '@angular/material';
+import { MatDialog } from '@angular/material/dialog';
 
 /** Custom Services. */
 import { OrganizationService } from 'app/organization/organization.service';