Merge pull request #356 from tuanle03/dependabot/bundler/chartkick-5.2.1

Bump chartkick from 5.1.2 to 5.2.1

Author: tuanle03

Gemfile.lock

@@ -94,7 +94,7 @@ GEM
       rack-test (>= 0.6.3)
       regexp_parser (>= 1.5, < 3.0)
       xpath (~> 3.2)
-    chartkick (5.1.2)
+    chartkick (5.2.1)
     concurrent-ruby (1.3.4)
     connection_pool (2.5.3)
     crass (1.0.6)