Merge pull request #70 from ginzarb/dependabot/bundler/rack-2.2.20

Bump rack from 2.2.19 to 2.2.20

Author: y-yagi

Gemfile.lock

@@ -80,7 +80,7 @@ GEM
     parallel (1.25.1)
     parslet (2.0.0)
     public_suffix (6.0.0)
-    rack (2.2.19)
+    rack (2.2.20)
     rb-fsevent (0.11.2)
     rb-inotify (0.11.1)
       ffi (~> 1.0)