fix: adds .gitkeep to the operations directory to satisfy zeitwork loader

Author: bougyman

domeapi.gemspec

@@ -16,6 +16,7 @@ Gem::Specification.new do |spec|
   spec.metadata['homepage_uri'] = spec.homepage
   spec.metadata['source_code_uri'] = 'https://github.com/rubyists/domeapi'
   spec.metadata['rubygems_mfa_required'] = 'true'
+  spec.metadata['license'] = 'MIT'
 
   # Specify which files should be added to the gem when it is released.
   # The `git ls-files -z` loads the files in the RubyGem that have been added into git.