Bump to version 3.0.0

Printing done on:
 Cashier Report
 Discount Report
 Sale Report

bookie/src/app/cashier-report/cashier-report.component.html

@@ -1,9 +1,13 @@
 <mat-card>
   <mat-card-title-group>
     <mat-card-title>Cashier Report</mat-card-title>
-    <button mat-button mat-icon-button (click)="exportCsv()">
+    <span class="spacer"></span>
+    <button mat-button mat-icon-button [disabled]="!info.cashier.id" (click)="exportCsv()">
       <mat-icon>save_alt</mat-icon>
     </button>
+    <button mat-button mat-icon-button [disabled]="!info.cashier.id" (click)="print()">
+      <mat-icon>print</mat-icon>
+    </button>
   </mat-card-title-group>
   <mat-card-content>
     <form [formGroup]="form" fxLayout="column">