add missing chefignore and fix version constraints for chef supermarket (#9)

Author: Patrick Schaumburg

chefignore

@@ -0,0 +1,110 @@
+# Put files/directories that should be ignored in this file when uploading
+# to a Chef Infra Server or Supermarket.
+# Lines that start with '# ' are comments.
+
+# OS generated files #
+######################
+.DS_Store
+ehthumbs.db
+Icon?
+nohup.out
+Thumbs.db
+
+# SASS #
+########
+.sass-cache
+
+# EDITORS #
+###########
+.#*
+.project
+.settings
+*_flymake
+*_flymake.*
+*.bak
+*.sw[a-z]
+*.tmproj
+*~
+\#*
+mkmf.log
+REVISION
+TAGS*
+tmtags
+
+## COMPILED ##
+##############
+*.class
+*.com
+*.dll
+*.exe
+*.o
+*.pyc
+*.so
+*/rdoc/
+a.out
+
+# Testing #
+###########
+.circleci/*
+.codeclimate.yml
+.foodcritic
+.kitchen*
+.rspec
+.rubocop.yml
+.travis.yml
+.watchr
+azure-pipelines.yml
+examples/*
+features/*
+Guardfile
+kitchen.yml*
+Procfile
+Rakefile
+spec/*
+spec/*
+spec/fixtures/*
+test/*
+
+# SCM #
+#######
+.git
+.gitattributes
+.gitconfig
+.github/*
+.gitignore
+.gitmodules
+.svn
+*/.bzr/*
+*/.git
+*/.hg/*
+*/.svn/*
+
+# Berkshelf #
+#############
+Berksfile
+Berksfile.lock
+cookbooks/*
+tmp
+
+# Bundler #
+###########
+vendor/*
+Gemfile
+Gemfile.lock
+
+# Policyfile #
+##############
+Policyfile.rb
+Policyfile.lock.json
+
+# Cookbooks #
+#############
+CHANGELOG*
+CONTRIBUTING*
+TESTING*
+CODE_OF_CONDUCT*
+
+# Vagrant #
+###########
+.vagrant
+Vagrantfile

metadata.rb

@@ -21,10 +21,10 @@
 
 # Supported OS
 supports 'amazon'
-supports 'centos', '>= 6'
-supports 'debian', '>= 9'
+supports 'centos', '>= 6.0'
+supports 'debian', '>= 9.0'
 supports 'opensuse'
 supports 'redhat'
 supports 'suse'
 supports 'ubuntu', '>= 16.04'
-supports 'windows', '>= 2012'
+supports 'windows', '>= 2012.0'