Version 3.3.1

This is just a small patch release to fix a typo.

v3.3.1 (2020-05-28)

Full Changelog

Fixed bugs:

• Fix typo in slime generator

Merged pull requests:

• Bump timex from 3.6.1 to 3.6.2 #167 (dependabot-preview[bot])
• Bump ex_doc from 0.21.3 to 0.22.1 #166 (dependabot-preview[bot])
• Bump phoenix_html from 2.13.3 to 2.13.4 #165 (dependabot-preview[bot])