Bump recaptcha from 4.6.4 to 4.12.0 (#546)

Bumps [recaptcha](https://github.com/ambethia/recaptcha) from 4.6.4 to 4.12.0.
- [Release notes](https://github.com/ambethia/recaptcha/releases)
- [Changelog](https://github.com/ambethia/recaptcha/blob/master/CHANGELOG.md)
- [Commits](https://github.com/ambethia/recaptcha/compare/v4.6.4...v4.12.0)

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

Gemfile

@@ -72,7 +72,7 @@ gem "rack-timeout", "~> 0.5"
 gem "rails", "~> 5.1"
 gem "rails-assets-airbrake-js-client", "~> 0.9", source: "https://rails-assets.org"
 gem "rails-observers", "~> 0.1"
-gem "recaptcha", "~> 4.6", require: "recaptcha/rails"
+gem "recaptcha", "~> 4.12", require: "recaptcha/rails"
 gem "redcarpet", "~> 3.4"
 gem "reverse_markdown", "~> 1.0"
 gem "rolify", "~> 5.2"

Gemfile.lock

@@ -696,7 +696,7 @@ GEM
       nokogiri (~> 1.5)
       trollop (~> 2.1)
     rdoc (4.3.0)
-    recaptcha (4.6.4)
+    recaptcha (4.12.0)
       json
     redcarpet (3.4.0)
     ref (2.0.0)
@@ -1007,7 +1007,7 @@ DEPENDENCIES
   rails-controller-testing (~> 1.0)
   rails-observers (~> 0.1)
   rb-fsevent (~> 0.10)
-  recaptcha (~> 4.6)
+  recaptcha (~> 4.12)
   redcarpet (~> 3.4)
   reverse_markdown (~> 1.0)
   rolify (~> 5.2)