Merge pull request #224 from khusnetdinov/dependabot/bundler/rack-2.1.4

Bump rack from 2.0.7 to 2.1.4

Author: khusnetdinov

Gemfile.lock

@@ -66,7 +66,7 @@ GEM
  pathutil (0.16.2)
  forwardable-extended (~> 2.6)
  public_suffix (4.0.1)
- rack (2.0.7)
+ rack (2.1.4)
  rack-jekyll (0.3.5)
  jekyll
  rack