gulp browser failed

[lealife]

On branch master-new

$ gulp browser
[11:41:22] Using gulpfile xxx/gulpfile.js
[11:41:23] Task 'browser' is not in your gulpfile
[11:41:23] Please check the documentation for proper gulpfile formatting

$ gulp -v     
[11:44:28] CLI version 3.8.11
[11:44:28] Local version 3.9.1

$ node -v
v8.10.0

[lealife]

Update gulpfile.js fix it:

var bitcoreTasks = require('bitcore-build');
var tasks = bitcoreTasks('lib');
var gulp = require('gulp');
gulp.task('browser', tasks.browser)