Bump grape-entity from 0.8.2 to 0.9.0 (publiclab#9333)

Bumps [grape-entity](https://github.com/ruby-grape/grape-entity) from 0.8.2 to 0.9.0.
- [Release notes](https://github.com/ruby-grape/grape-entity/releases)
- [Changelog](https://github.com/ruby-grape/grape-entity/blob/master/CHANGELOG.md)
- [Commits](ruby-grape/grape-entity@v0.8.2...v0.9.0)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Gemfile.lock

@@ -195,7 +195,7 @@ GEM
       mustermann-grape (~> 1.0.0)
       rack (>= 1.3.0)
       rack-accept
-    grape-entity (0.8.2)
+    grape-entity (0.9.0)
       activesupport (>= 3.0.0)
       multi_json (>= 1.3.2)
     grape-rails-cache (0.1.2)
@@ -226,7 +226,7 @@ GEM
     http_accept_language (2.1.1)
     http_parser.rb (0.6.0)
     httpclient (2.8.3)
-    i18n (1.8.9)
+    i18n (1.8.10)
       concurrent-ruby (~> 1.0)
     i18n-js (3.8.0)
       i18n (>= 0.6.6)