Merge pull request #25 from ruby-grape/dependabot/bundler/rack-2.2.3

Bump rack from 2.0.8 to 2.2.3

Author: dblock

Gemfile.lock

@@ -103,7 +103,7 @@ GEM
       method_source (~> 0.9.0)
     public_suffix (4.0.6)
     racc (1.5.2)
-    rack (2.0.8)
+    rack (2.2.3)
     rack-accept (0.4.5)
       rack (>= 0.4)
     rack-cors (1.0.6)