Merge pull request #6 from Rhelli/dependabot/bundler/rack-2.2.3

Bump rack from 2.1.2 to 2.2.3

Author: Rhelli

Gemfile.lock

@@ -129,7 +129,7 @@ GEM
       terrapin (~> 0.6.0)
     public_suffix (4.0.3)
     puma (3.12.4)
-    rack (2.1.2)
+    rack (2.2.3)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (5.2.4.1)