How to setup dev env / run tests?

[nrser]

I'm trying to try out my fix to #94, but I'm not sure how to get a local development environment setup and run tests (if there are any?):

1. I didn't see any instructions in README.md or test tasks Rakefile.
2. Gemfile.lock is committed, so I'm assuming I should be developing and testing with those exact versions? However, it lists the yard-cucumber gem itself as 3.1.0 when the source is at 4.0, which prevents a --frozen install. I assume this an oversight or missed commit?
3. After manually changing the yard-cucumber version in Gemfile.lock I can install the gems with bundler, but I'm not sure how to run the Cucumber tests (I'm new to Cucumber), or if the features in example/ are tests of the gem or just general examples...
   1. bundle exec cucumber fails not finding a features/ directory.
   2. bundle exec cucumber example fails with a parser error on example/empty.feature.
4. There is a .rspec file in the project root but rspec is not included in yard-cucumber.gemspec or Gemfile, and I don't see a spec/ directory specs anywhere else.
5. bundle exec rake gendoc has errors for README.md files in example/.