fix: fix tslint errors

Author: DimitarTachev

lib/services/livesync/livesync-service.ts

@@ -727,7 +727,9 @@ export class LiveSyncService extends EventEmitter implements IDebugLiveSyncServi
 			this.$processService.attachToProcessExitSignals(this, () => {
 				if (liveSyncData.syncToPreviewApp) {
 					// Do not await here, we are in process exit's handler.
+					/* tslint:disable:no-floating-promises */
 					this.$previewAppLiveSyncService.stopLiveSync();
+					/* tslint:enable:no-floating-promises */
 				}
 
 				_.keys(this.liveSyncProcessesInfo).forEach(projectDir => {

lib/services/livesync/playground/preview-app-livesync-service.ts

@@ -123,7 +123,7 @@ export class PreviewAppLiveSyncService implements IPreviewAppLiveSyncService {
 		await this.$platformService.preparePlatform(prepareInfo);
 	}
 
-	private async showWarningsForNativeFiles(files: string[]): Promise<void> {
+	private showWarningsForNativeFiles(files: string[]): void {
 		if (files && files.length) {
 			for (const file of files) {
 				if (file.indexOf(APP_RESOURCES_FOLDER_NAME) > -1) {