Bump mime-types-data from 3.2018.0812 to 3.2019.0331

Bumps [mime-types-data](https://github.com/mime-types/mime-types-data) from 3.2018.0812 to 3.2019.0331.
- [Release notes](https://github.com/mime-types/mime-types-data/releases)
- [Changelog](https://github.com/mime-types/mime-types-data/blob/master/History.md)
- [Commits](mime-types/mime-types-data@v3.2018.0812...v3.2019.0331)

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

Gemfile.lock

@@ -44,7 +44,7 @@ GEM
     method_source (0.9.2)
     mime-types (3.2.2)
       mime-types-data (~> 3.2015)
-    mime-types-data (3.2018.0812)
+    mime-types-data (3.2019.0331)
     multi_json (1.13.1)
     nenv (0.3.0)
     netrc (0.11.0)