v2.1.1

• Allow more flexibility of request objects
  #346
• Address issue with handleItemWithError possible not calling the callback
  #345
• Fixed a typo in README.md
  #343
• unify configuration options
  #341
• add some intervals to keep the event loop running when wait is called
  #338
• [Fixes #336] Propagate message
  #337
• [Fixes #269] get rid of rollbar wrapper stack frames
  #335
• first pass at a typescript declaration file
  #334
• Fix #331 Verbose logging was using the wrong key structure
  #332