0.5.5

[williamhorning]

• [x] edit/delete support
  • [x] bolt_plugin
  • [x] core/bridges (disable in prod)
• [x] tests
  • [x] core/cmds
  • [X] core/utils
  • [x] bolt-migrations
• [x] rewrite
  • [x] plugin api (core/utils/plugins)
  • [x] slash commands (bolt-discord)
  • [x] webhook migration (bolt-guilded, #36)
• [x] docs (williamhorning/williamhorning/pull/3)