(- fix typo) Use correct 'Paws.coffee' name in require

This was causing a `Cannot find module '../Source/paws.coffee'` error when running the tests on case-sensitive systems.

Signed-off-by: elliottcable <me@ell.io>

Test/utility.tests.coffee

@@ -1,5 +1,5 @@
 `require = require('../Source/cov_require.js')(require)`
-paws = require "../Source/paws.coffee"
+paws = require "../Source/Paws.coffee"
 expect = require 'expect.js'
 
 describe "Paws' utilities:", ->