Bump acts-as-taggable-on from 4.0.0 to 7.0.0

Bumps [acts-as-taggable-on](https://github.com/mbleigh/acts-as-taggable-on) from 4.0.0 to 7.0.0.
- [Release notes](https://github.com/mbleigh/acts-as-taggable-on/releases)
- [Changelog](https://github.com/mbleigh/acts-as-taggable-on/blob/master/CHANGELOG.md)
- [Commits](https://github.com/mbleigh/acts-as-taggable-on/compare/v4.0.0...v7.0.0)

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

Gemfile

@@ -68,7 +68,7 @@ gem 'actionpack-action_caching'
 #   AMS is deprecated, we will introduce an alternative at some point
 gem "active_model_serializers", "0.8.4"
 gem 'activerecord-session_store'
-gem 'acts-as-taggable-on', '~> 4.0'
+gem 'acts-as-taggable-on', '~> 7.0'
 gem 'angularjs-file-upload-rails', '~> 2.4.1'
 gem 'custom_error_message', github: 'jeremydurham/custom-err-msg'
 gem 'dalli'

Gemfile.lock

@@ -103,8 +103,8 @@ GEM
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    acts-as-taggable-on (4.0.0)
-      activerecord (>= 4.0)
+    acts-as-taggable-on (7.0.0)
+      activerecord (>= 5.0, < 6.2)
     acts_as_list (0.9.19)
       activerecord (>= 3.0)
     addressable (2.7.0)
@@ -592,7 +592,7 @@ DEPENDENCIES
   activerecord-import
   activerecord-postgresql-adapter
   activerecord-session_store
-  acts-as-taggable-on (~> 4.0)
+  acts-as-taggable-on (~> 7.0)
   acts_as_list (= 0.9.19)
   andand
   angular-rails-templates (>= 0.3.0)