Bump to version 3.0.0

Printing done on:
 Cashier Report
 Discount Report
 Sale Report

bookie/src/app/cashier-report/cashier-report.service.ts

@@ -46,4 +46,20 @@ export class CashierReportService {
 
       .pipe(catchError(this.log.handleError(serviceName, 'activeCashiers')));
   }
+
+  print(id: string, startDate: string, finishDate): Observable<boolean> {
+    const printUrl = `${url}/print/${id}`;
+    const options = { params: new HttpParams() };
+    if (startDate !== null) {
+      options.params = options.params.set('s', startDate);
+    }
+    if (finishDate !== null) {
+      options.params = options.params.set('f', finishDate);
+    }
+    return <Observable<boolean>>(
+      this.http
+        .get<boolean>(printUrl, options)
+        .pipe(catchError(this.log.handleError(serviceName, 'print')))
+    );
+  }
 }