Updating dev dependencies

refs #3795

- updates all dev dependencies to their latest version number
- jshint now complains about the Promise global, removed it from predef in
  lieu of a better solution
- changes in should require minor updates to the tests
- tests are passing and all major grunt commands appear to work: clean,
  init, prod, validate and release
Merge pull request #4054 from ErisDS/dev-deps

Updating dev dependencies