Bump http from 3.0.0 to 3.2.0

Bumps [http](https://github.com/httprb/http) from 3.0.0 to 3.2.0.
- [Release notes](https://github.com/httprb/http/releases)
- [Changelog](https://github.com/httprb/http/blob/master/CHANGES.md)
- [Commits](httprb/http@v3.0.0...v3.2.0)

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

Gemfile.lock

@@ -95,7 +95,7 @@ GEM
       rake (> 10, < 13)
       thor (~> 0.19)
     docile (1.1.5)
-    domain_name (0.5.20170404)
+    domain_name (0.5.20180417)
       unf (>= 0.0.5, < 1.0.0)
     doorkeeper (4.3.2)
       railties (>= 4.2)
@@ -127,14 +127,14 @@ GEM
     hashie (3.5.7)
     heapy (0.1.3)
     holiday_jp (0.7.0)
-    http (3.0.0)
+    http (3.2.0)
       addressable (~> 2.3)
       http-cookie (~> 1.0)
-      http-form_data (>= 2.0.0.pre.pre2, < 3)
+      http-form_data (~> 2.0)
       http_parser.rb (~> 0.6.0)
     http-cookie (1.0.3)
       domain_name (~> 0.5)
-    http-form_data (2.0.0)
+    http-form_data (2.1.0)
     http_accept_language (2.1.1)
     http_parser.rb (0.6.0)
     i18n (1.0.0)