Updated to angular 11

Now compiling with strict mode in typescript
Need to error checking now

bookie/src/app/sales/quantity/quantity.component.spec.ts

@@ -1,4 +1,4 @@
-import { async, ComponentFixture, TestBed } from '@angular/core/testing';
+import { ComponentFixture, TestBed, waitForAsync } from '@angular/core/testing';
 
 import { QuantityComponent } from './quantity.component';
 
@@ -6,11 +6,13 @@ describe('QuantityComponent', () => {
   let component: QuantityComponent;
   let fixture: ComponentFixture<QuantityComponent>;
 
-  beforeEach(async(() => {
-    TestBed.configureTestingModule({
-      declarations: [QuantityComponent],
-    }).compileComponents();
-  }));
+  beforeEach(
+    waitForAsync(() => {
+      TestBed.configureTestingModule({
+        declarations: [QuantityComponent],
+      }).compileComponents();
+    }),
+  );
 
   beforeEach(() => {
     fixture = TestBed.createComponent(QuantityComponent);

bookie/src/app/sales/quantity/quantity.component.ts

@@ -18,7 +18,10 @@ export class QuantityComponent implements OnInit {
     private fb: FormBuilder,
     private math: MathService,
   ) {
-    this.createForm();
+    // Create form
+    this.form = this.fb.group({
+      quantity: '',
+    });
   }
 
   ngOnInit() {
@@ -27,12 +30,6 @@ export class QuantityComponent implements OnInit {
     });
   }
 
-  createForm() {
-    this.form = this.fb.group({
-      quantity: '',
-    });
-  }
-
   accept(): void {
     const quantity = this.math.parseAmount(this.form.value.quantity);
     this.dialogRef.close(quantity);