Match Windows directories with forward slashes

[seep]

I had an edge case with absolute paths on Windows. After several Browserify transforms, I was ultimately requiring a filepath like,

D:/some/project/directory/file.js

Admittedly that is a strange looking path, because it's using forward slashes with a Windows drive letter. However, I cross-referenced require.resolve and it handled it correctly, so I thought I would track down the discrepancy in node-resolve. The path was not matching the regex used to differentiate files from modules. Adding a small or to the regex seems to solve this for me.

[ghost]

Merged into 0.7.4. Thanks for the patch!