v0.17.0-rc3

A few more changes but most shouldn't cause big issues, i.e: they won't feel as the previous breaking changes.

Features added

• Add include_icon to auth.teams.list by @nlopes in #1394
• Add a few missing fields to conversation by @nlopes in #1395
• Add missing icons image_132 and image_230 to Team Icons by @nlopes in #1396
• Add ForceInviteUsersToConversation by @nlopes in #1397
• Add a bunch of missing params to usergroups.* calls by @nlopes in #1398
• Add FocusOnLoad to DateTimePickerBlockElement by @nlopes in #1399
• Add Border and Offset to RichTextList by @nlopes in #1400
• Add some missing admin.conversations endpoints by @samstarling in #1401

Fixes / cleanup

• Tidy up go.mod, add a linting check to prevent this by @samstarling in #1405
• Handle nil being passed in to newTextParser by @samstarling in #1403
• Remove a number of unused functions and parameters by @samstarling in #1402
• Tidy up arguments to _search function by @samstarling in #1404

Full Changelog: v0.17.0-rc2...v0.17.0-rc3