Add uuid-validate to dev dependencies

Dependencies

• [2] JXG3FCXY Upgrade ps + halogen versions.

Change contents

• replacement in client/package.json at line 6
  [2.444]→[2.444:467](∅→∅)
  − "rimraf": "^2.5.4"
  [2.444]

  [2.467]
  + "rimraf": "^2.5.4",

  + "uuid-validate": "0.0.2"