Fixed COOK-4414 added ChefSpec matchers

Added custom matchers for all Windows cookbook LWRPs, as suggested by Seth
https://github.com/sethvargo/chefspec/issues/372. This allows consumers of Windows cookbook LWRPs to much more easily write ChefSpec tests.
Merge pull request #74 from daptiv/COOK-4414

Fixed COOK-4414 added ChefSpec matchers
Version bump to 1.30.2
Publish 1.30.2 Changelog
Version bump to 1.30.3 (for development)
Ensure win_friendly_path doesn't error out when ::File::ALT_SEPARATOR is nil

This can happen when using the win_friendly_path method on a Linux box. This might happen when writing ChefSpec tests on a non-Windows host.