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

Fixes: #1216

src/app/organization/standing-instructions-history/standing-instructions-history.component.ts

@@ -1,6 +1,8 @@
 /** Angular Imports */
 import { Component, OnInit, ViewChild } from '@angular/core';
-import { MatTableDataSource, MatPaginator, MatSort, MatTable } from '@angular/material';
+import { MatPaginator } from '@angular/material/paginator';
+import { MatSort } from '@angular/material/sort';
+import { MatTableDataSource, MatTable } from '@angular/material/table';
 import { FormGroup, FormBuilder, FormControl } from '@angular/forms';
 import { Router, ActivatedRoute } from '@angular/router';
 import { DatePipe } from '@angular/common';