Merge pull request #265 from sinatra/dependabot/bundler/rake-12.3.3

Bump rake from 12.0.0 to 12.3.3

Author: jkowens

Gemfile.lock

@@ -43,7 +43,7 @@ GEM
     pathutil (0.14.0)
       forwardable-extended (~> 2.6)
     public_suffix (2.0.5)
-    rake (12.0.0)
+    rake (12.3.3)
     rb-fsevent (0.9.8)
     rb-inotify (0.9.8)
       ffi (>= 0.5.0)