Bump mime-types from 3.2.2 to 3.3

Bumps [mime-types](https://github.com/mime-types/ruby-mime-types) from 3.2.2 to 3.3.
- [Release notes](https://github.com/mime-types/ruby-mime-types/releases)
- [Changelog](https://github.com/mime-types/ruby-mime-types/blob/master/History.md)
- [Commits](mime-types/ruby-mime-types@v3.2.2...v3.3)

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

Gemfile.lock

@@ -44,9 +44,9 @@ GEM
     mail (2.7.1)
       mini_mime (>= 0.1.1)
     method_source (0.9.2)
-    mime-types (3.2.2)
+    mime-types (3.3)
       mime-types-data (~> 3.2015)
-    mime-types-data (3.2018.0812)
+    mime-types-data (3.2019.0904)
     mini_mime (1.0.2)
     mini_portile2 (2.4.0)
     multipart-post (2.0.0)