Fix Bug 2121: NG-UI uses unmaintained Chokidar version

	- Upgraded Angular from 11 to 14 version to remove chokidar
	  unmaintained version.
	- Changed linting tool tslint to eslint for angular 14 as tslint
	  is depreacted after angular 12
	- Resolved linting issues from code

Change-Id: I00e908ab651db0f080e0d18a9d1c9711f4e36b91
Signed-off-by: SANDHYA.JS <sandhya.j@tataelxsi.co.in>
diff --git a/src/services/DataService.ts b/src/services/DataService.ts
index e64c34c..0e3be87 100644
--- a/src/services/DataService.ts
+++ b/src/services/DataService.ts
@@ -32,6 +32,7 @@
     public messageSource: BehaviorSubject<{}> = new BehaviorSubject<{}>({});
 
     /** current message @public */
+    // eslint-disable-next-line no-invalid-this
     public currentMessage:  Observable<{}> = this.messageSource.asObservable();
     /** change message function @public */
     public changeMessage(message: {}): void {