Bump i18n from 0.7.0 to 0.8.0

Bumps [i18n](https://github.com/ruby-i18n/i18n) from 0.7.0 to 0.8.0.
- [Release notes](https://github.com/ruby-i18n/i18n/releases)
- [Changelog](https://github.com/ruby-i18n/i18n/blob/master/CHANGELOG.md)
- [Commits](ruby-i18n/i18n@v0.7.0...v0.8.0)

---
updated-dependencies:
- dependency-name: i18n
  dependency-type: indirect
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -99,7 +99,7 @@ GEM
     http-cookie (1.0.3)
       domain_name (~> 0.5)
     httpclient (2.8.3)
-    i18n (0.7.0)
+    i18n (0.8.0)
     libnotify (0.8.4)
       ffi (>= 1.0.11)
     listen (3.1.5)