Bump net-http from 0.5.0 to 0.6.0

Bumps [net-http](https://github.com/ruby/net-http) from 0.5.0 to 0.6.0.
- [Release notes](https://github.com/ruby/net-http/releases)
- [Commits](ruby/net-http@v0.5.0...v0.6.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Gemfile.lock

@@ -273,7 +273,7 @@ GEM
       coffee-rails (>= 3.2.1)
       jquery-rails
       rails (>= 3.2.0)
-    net-http (0.5.0)
+    net-http (0.6.0)
       uri
     net-imap (0.5.1)
       date