message: Use yarn create vsix package
diff: @@ -58,6 +58,7 @@ gulp.task("vsce:publish", function() {
  gulp.task("vsce:package", function() {
  return vsce.createVSIX({
  + useYarn: "true",
  packagePath: "../../dist/webts-0.0.0-UNTRACKEDVERSION.vsix"
  });
  });
  