Merge pull request #501 from scala-js/dependabot/bundler/rack-2.2.3

Bump rack from 2.0.8 to 2.2.3

Author: sjrd

Gemfile.lock

@@ -54,7 +54,7 @@ GEM
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
     public_suffix (3.0.3)
-    rack (2.0.8)
+    rack (2.2.3)
     rb-fsevent (0.10.3)
     rb-inotify (0.9.10)
       ffi (>= 0.5.0, < 2)