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

Fixes: #1216

src/app/accounting/search-journal-entry/search-journal-entry.component.ts

@@ -1,6 +1,7 @@
 /** Angular Imports */
 import { Component, OnInit, ViewChild, AfterViewInit } from '@angular/core';
-import { MatPaginator, MatSort } from '@angular/material';
+import { MatPaginator } from '@angular/material/paginator';
+import { MatSort } from '@angular/material/sort';
 import { FormControl } from '@angular/forms';
 import { Router, ActivatedRoute } from '@angular/router';
 
@@ -104,9 +105,9 @@ export class SearchJournalEntryComponent implements OnInit, AfterViewInit {
   ];
 
   /** Paginator for journal entries table. */
-  @ViewChild(MatPaginator) paginator: MatPaginator;
+  @ViewChild(MatPaginator, { static: true }) paginator: MatPaginator;
   /** Sorter for journal entries table. */
-  @ViewChild(MatSort) sort: MatSort;
+  @ViewChild(MatSort, { static: true }) sort: MatSort;
 
   /**
    * Retrieves the offices and gl accounts data from `resolve`.