enable jquery migrate helper without plugin code example

Example: jquery migrate

Build and run tests:

Build with npm commands
$ git clone git://github.com/jquery/jquery-migrate.git
$ cd jquery-migrate
$ npm install
$ npm run build

Build with grunt
$ git clone git://github.com/jquery/jquery-migrate.git
$ cd jquery-migrate
$ npm install
$ npm install -g grunt-cli
$ grunt build

Run tests
$ npm test
Or
$ grunt test