Bump rollbar from 3.0.1 to 3.1.2

Bumps [rollbar](https://github.com/rollbar/rollbar-gem) from 3.0.1 to 3.1.2.
- [Release notes](https://github.com/rollbar/rollbar-gem/releases)
- [Changelog](https://github.com/rollbar/rollbar-gem/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rollbar/rollbar-gem/compare/v3.0.1...v3.1.2)

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

Gemfile

@@ -49,7 +49,7 @@ gem "recipient_interceptor", "~> 0.2.0"
 gem "redcarpet", "~> 3.5.0"
 gem "responders", "~> 3.0.1"
 gem "rinku", "~> 2.0.6", require: "rails_rinku"
-gem "rollbar", "~> 3.0.1"
+gem "rollbar", "~> 3.1.2"
 gem "sassc-rails", "~> 2.1.2"
 gem "savon", "~> 2.12.1"
 gem "sitemap_generator", "~> 6.1.2"

Gemfile.lock

@@ -476,7 +476,7 @@ GEM
     retriable (3.1.2)
     rexml (3.2.4)
     rinku (2.0.6)
-    rollbar (3.0.1)
+    rollbar (3.1.2)
     rspec-core (3.9.2)
       rspec-support (~> 3.9.3)
     rspec-expectations (3.9.2)
@@ -712,7 +712,7 @@ DEPENDENCIES
   redcarpet (~> 3.5.0)
   responders (~> 3.0.1)
   rinku (~> 2.0.6)
-  rollbar (~> 3.0.1)
+  rollbar (~> 3.1.2)
   rspec-rails (~> 4.0)
   rubocop (~> 0.91.0)
   rubocop-performance (~> 1.7.1)