Merge pull request #28 from cloudfoundry-samples/dependabot/bundler/example_app/rake-12.3.3

Bump rake from 12.1.0 to 12.3.3 in /example_app

Author: elenasharma

example_app/Gemfile.lock

@@ -46,7 +46,7 @@ GEM
       rack
     rack-test (0.7.0)
       rack (>= 1.0, < 3)
-    rake (12.1.0)
+    rake (12.3.3)
     rb-fsevent (0.10.2)
     rb-inotify (0.9.10)
       ffi (>= 0.5.0, < 2)