Merge pull request #16 from tspascoal/master

Improve error handling for createWorkItem
Fixing failing tests
Updating request-json dependency version
Merge pull request #17 from reverentgeek/master

Fixed failing tests. Now supports work item updates with json-patch.
Fix parseReplyData scope
  parseReplyData didn't had access to authenticationType
  The condition for OAuth unauthenticated failure was inversed