Merge 1ca18f291f into 8d2ade1bdc

Bumps [chartkick](https://github.com/ankane/chartkick) from 5.2.0 to 5.2.1.
- [Changelog](https://github.com/ankane/chartkick/blob/master/CHANGELOG.md)
- [Commits](https://github.com/ankane/chartkick/compare/v5.2.0...v5.2.1)

---
updated-dependencies:
- dependency-name: chartkick
  dependency-version: 5.2.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Gemfile.lock

@@ -129,7 +129,7 @@ GEM
       rack-test (>= 0.6.3)
       regexp_parser (>= 1.5, < 3.0)
       xpath (~> 3.2)
-    chartkick (5.2.0)
+    chartkick (5.2.1)
     chunky_png (1.4.0)
     coderay (1.1.3)
     concurrent-ruby (1.3.5)