当我尝试编译为咕unt声时，会出现以下单词。
>> Local Npm module "grunt-ts" not found. Is it installed?
>> Local Npm module "grunt-contrib-watch" not found. Is it installed?
>> Local Npm module "grunt-contrib-copy" not found. Is it installed?
>> Local Npm module "grunt-browserify" not found. Is it installed?
Warning: Task "ts" not found. Use --force to continue.
Aborted due to warnings.
我该如何解决这个问题？