chore: stop webpack compiler when ctrl+c is pressed while executing tns preview --bundle command (#661)

Author: Fatme

lib/before-watch.js

@@ -12,6 +12,10 @@ module.exports = function ($logger, $liveSyncService, $options, $devicesService,
                         stopWebpackCompiler(platform);
                     }
                 });
+
+                process.on("exit", () => {
+                    stopWebpackCompiler();
+                });
             });
 
             const platforms = hookArgs.config.platforms;