fix(core): Updated dependencies and added assetsHandler instantiation

ts/tswatch.classes.tswatch.ts

@@ -19,6 +19,7 @@ export class TsWatch {
    */
   public async start() {
     const tsbundle = new plugins.tsbundle.TsBundle();
+    const assetsHandler = new plugins.tsbundle.AssetsHandler();
     const htmlHandler = new plugins.tsbundle.HtmlHandler();
     switch (this.watchmode) {
       case 'test':