3.3.6

Summary

• Typo fix and branch id encoding thanks to Igor Katsuba
  in #92 and #91
• Removal of non standard babel plugins in prep for move to Typescript thanks to Pavel Birukov in #90
• Docs update pointing to the wrong npm package thanks to Joseph Petersen in #88
• Licence update (to match the year) thanks to Sharma-Rajat in #87