Bump chartkick from 4.2.1 to 5.0.1 (#939)

Bumps [chartkick](https://github.com/ankane/chartkick) from 4.2.1 to 5.0.1.
- [Release notes](https://github.com/ankane/chartkick/releases)
- [Changelog](https://github.com/ankane/chartkick/blob/master/CHANGELOG.md)
- [Commits](ankane/chartkick@v4.2.1...v5.0.1)

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

Signed-off-by: dependabot[bot] <[email protected]>

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Gemfile.lock

@@ -108,7 +108,7 @@ GEM
       mime-types (>= 1.16)
     carrierwave-postgresql (0.2.0)
       carrierwave (~> 0.10.0)
-    chartkick (4.2.1)
+    chartkick (5.0.1)
     coderay (1.1.3)
     coffee-rails (5.0.0)
       coffee-script (>= 2.2.0)