Updated to angular 11

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

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);