Bump em-http-request from 1.1.5 to 1.1.6

Bumps [em-http-request](https://github.com/igrigorik/em-http-request) from 1.1.5 to 1.1.6.
- [Release notes](https://github.com/igrigorik/em-http-request/releases)
- [Changelog](https://github.com/igrigorik/em-http-request/blob/master/Changelog.md)
- [Commits](igrigorik/em-http-request@v1.1.5...v1.1.6)

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

Author: dependabot[bot]

Gemfile.lock

@@ -135,7 +135,7 @@ GEM
     domain_name (0.5.20180417)
       unf (>= 0.0.5, < 1.0.0)
     e2mmap (0.1.0)
-    em-http-request (1.1.5)
+    em-http-request (1.1.6)
       addressable (>= 2.3.4)
       cookiejar (!= 0.3.1)
       em-socksify (>= 0.3)