Bump groupdate from 3.2.0 to 5.1.0

Bumps [groupdate](https://github.com/ankane/groupdate) from 3.2.0 to 5.1.0.
- [Release notes](https://github.com/ankane/groupdate/releases)
- [Changelog](https://github.com/ankane/groupdate/blob/master/CHANGELOG.md)
- [Commits](https://github.com/ankane/groupdate/compare/v3.2.0...v5.1.0)

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

Gemfile

@@ -24,7 +24,7 @@ gem "globalize", "~> 5.2.0"
 gem "globalize-accessors", "~> 0.2.1"
 gem "graphiql-rails", "~> 1.4.1"
 gem "graphql", "~> 1.7.8"
-gem "groupdate", "~> 3.2.0"
+gem "groupdate", "~> 5.1.0"
 gem "initialjs-rails", "~> 0.2.0.8"
 gem "invisible_captcha", "~> 0.10.0"
 gem "jquery-fileupload-rails"

Gemfile.lock

@@ -256,8 +256,8 @@ GEM
     graphiql-rails (1.4.8)
       rails
     graphql (1.7.8)
-    groupdate (3.2.0)
-      activesupport (>= 3)
+    groupdate (5.1.0)
+      activesupport (>= 5)
     gyoku (1.3.1)
       builder (>= 2.1.2)
     hashie (4.1.0)
@@ -653,7 +653,7 @@ DEPENDENCIES
   globalize-accessors (~> 0.2.1)
   graphiql-rails (~> 1.4.1)
   graphql (~> 1.7.8)
-  groupdate (~> 3.2.0)
+  groupdate (~> 5.1.0)
   i18n-tasks (~> 0.9.29)
   initialjs-rails (~> 0.2.0.8)
   invisible_captcha (~> 0.10.0)