Doesn't work on Windows

[mcascone]

I know you list it as not supported, but there is a bit of code in here testing for Windows, so i gave it a shot.

I get this error:

================================================================================
       Recipe Compile Error in C:/Users/mcascone/AppData/Local/Temp/kitchen/cache/cookbooks/terraform/recipes/default.rb
       ================================================================================

       NoMethodError
       -------------
       undefined method `gpg_install' for cookbook: terraform, recipe: gpgme :Chef::Recipe

       System Info:
       ------------
       chef_version=15.2.20
       platform=windows
       platform_version=6.3.9600
       ruby=ruby 2.6.3p62 (2019-04-16 revision 67580) [x64-mingw32]
       program_name=C:/opscode/chef/bin/chef-client
       executable=C:/opscode/chef/bin/chef-client

...which isn't terribly unexpected. It's trying to run linux commands.

[haidangwa]

@mcascone Pull requests are welcome!