Log Message:
Update mikutter to 3.5.10.

pkgsrc changes:

- add a patch for workaround for upstream Redmine ticket #1064
- update dependencies per upstream Gemfile

Upstream changes:

- error messages about ja_KS locale on startup
- restrict version of Deferred to avoid issue on the latest one
- fix typo
- new functions for UserConfig
 - trigger 'userconfig_modify' events when UserConfig values are updated
 - abandon use of UserConfig.connect to avoid memory leak on some error paths
- crash in some case if actual timeline is not created
- specify gtk2 3.1.8