Bump i18n from 0.6.0 to 0.9.5 in /edx_specs

Bumps [i18n](https://github.com/svenfuchs/i18n) from 0.6.0 to 0.9.5.
- [Release notes](https://github.com/svenfuchs/i18n/releases)
- [Changelog](https://github.com/ruby-i18n/i18n/blob/master/CHANGELOG.md)
- [Commits](ruby-i18n/i18n@v0.6.0...v0.9.5)

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

edx_specs/Gemfile.lock

@@ -15,6 +15,7 @@ GEM
     childprocess (0.3.5)
       ffi (~> 1.0, >= 1.0.6)
     coderay (1.0.7)
+    concurrent-ruby (1.1.5)
     diff-lcs (1.1.3)
     eventmachine (1.0.0)
     faker (1.0.1)
@@ -23,7 +24,8 @@ GEM
       eventmachine (>= 0.12.0)
     ffi (1.1.5)
     http_parser.rb (0.5.3)
-    i18n (0.6.0)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     json (1.7.4)
     launchy (2.1.1)
       addressable (~> 2.3)