feat: start 执行之前，执行一次 build task

Author: wangxingkang

src/gulpfile.ts

@@ -19,8 +19,8 @@ gulp.task('build-with-lib', done => {
 gulp.task('build', gulp.parallel('build-with-es', 'build-with-lib'));
 
 // watch组件修改
-gulp.task('start', () => {
+gulp.task('start', gulp.series('build', () => {
   debug.log('start watch ....');
   const componentDir = getComponentDir();
   gulp.watch([`${componentDir}/**/*`], gulp.parallel('build'));
-});
+}));