devDependencies vows update

[admstesla]

This PR updated the version of vows which appears to cause an error when running npm test,

All tests were executed and passed after these updates:

npm test

> connect-flash@0.1.1 test
> NODE_PATH=lib node_modules/.bin/vows test/*-test.js

··················· ·  
  ✓ OK » 20 honored (0.005s)