Updated to angular 10

Moved to eslint for linting
Added prettier for formatting
Fixed minor errors

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

@@ -31,7 +31,7 @@ export class BillsComponent implements OnInit {
     private dialog: MatDialog,
     private toaster: ToasterService,
     private auth: AuthService,
-    private bs: BillService,
+    public bs: BillService,
     private tSer: TableService
   ) {
   }

bookie/src/app/sales/reason/reason.component.html

@@ -9,7 +9,7 @@
           <mat-form-field fxFlex>
             <mat-label>Reason</mat-label>
             <input type="text" matInput #son placeholder="Reason" formControlName="son" autocomplete="off"
-                   (focus)="select($event.target.value) && son.select()" (input)="select($event.target.value)">
+                   (focus)="select(son.value) && son.select()" (input)="select(son.value)">
           </mat-form-field>
         </mat-footer-cell>
       </ng-container>