[ACA-1443] prettier formatting and checks (#629)

* intergrate prettier

* update settings

* integrate with travis

* unified formatting across all files

src/app/components/context-menu/interfaces.ts

@@ -24,9 +24,9 @@
  */
 
 export interface ContextmenuOverlayConfig {
-    panelClass?: string;
-    hasBackdrop?: boolean;
-    backdropClass?: string;
-    source?: MouseEvent;
-    data?: any;
+  panelClass?: string;
+  hasBackdrop?: boolean;
+  backdropClass?: string;
+  source?: MouseEvent;
+  data?: any;
 }