Bump i18n from 1.8.10 to 1.12.0

Bumps [i18n](https://github.com/ruby-i18n/i18n) from 1.8.10 to 1.12.0.
- [Release notes](https://github.com/ruby-i18n/i18n/releases)
- [Changelog](https://github.com/ruby-i18n/i18n/blob/master/CHANGELOG.md)
- [Commits](https://github.com/ruby-i18n/i18n/compare/v1.8.10...v1.12.0)

---
updated-dependencies:
- dependency-name: i18n
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Gemfile.lock

@@ -326,7 +326,7 @@ GEM
     highline (2.0.3)
     hiredis (0.6.3)
     htmlentities (4.3.4)
-    i18n (1.8.10)
+    i18n (1.12.0)
       concurrent-ruby (~> 1.0)
     i18n-js (3.9.2)
       i18n (>= 0.6.6)