fix(umd): #340 pass in root instead of deps

Follow outlined UMD (Universal Module Definition)
- https://github.com/umdjs/umd/blob/master/amdWeb.js

Related Issues:
- https://github.com/esvit/ng-table/issues/340
- https://github.com/esvit/ng-table/pull/284
- https://github.com/esvit/ng-table/pull/307