build(deps): Bump chartkick from 3.3.1 to 3.4.0 (#298)

Bumps [chartkick](https://github.com/ankane/chartkick) from 3.3.1 to 3.4.0.
- [Release notes](https://github.com/ankane/chartkick/releases)
- [Changelog](https://github.com/ankane/chartkick/blob/master/CHANGELOG.md)
- [Commits](ankane/chartkick@v3.3.1...v3.4.0)

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

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

Author: dependabot[bot]

Gemfile

@@ -53,7 +53,7 @@ gem 'haml-rails', '~> 2.0'
 gem 'simple_form'
 gem 'ajax-datatables-rails', '~> 1.0'
 gem 'roadie-rails'
-gem 'chartkick', '~> 3.3'
+gem 'chartkick', '~> 3.4'
 gem 'groupdate'
 gem 'font-awesome-rails', '~> 4.0' # needed for icon helpers
 gem 'mustache', '~> 1.0'

Gemfile.lock

@@ -100,7 +100,7 @@ GEM
       rack-test (>= 0.6.3)
       regexp_parser (~> 1.5)
       xpath (~> 3.2)
-    chartkick (3.3.1)
+    chartkick (3.4.0)
     childprocess (3.0.0)
     chromedriver-helper (2.1.1)
       archive-zip (~> 0.10)
@@ -448,7 +448,7 @@ DEPENDENCIES
   bootstrap (~> 4.3.1)
   byebug
   capybara (>= 2.15)
-  chartkick (~> 3.3)
+  chartkick (~> 3.4)
   chromedriver-helper
   codeclimate-test-reporter (~> 0.6.0)
   devise (~> 4.7)