Reset patch-level dependency to 0

Created by: stim371

I was having trouble upgrading rspec to 3.10, and it seems like this change (https://github.com/rspec/rspec-core/commit/acc718ed9dcb343c9d756610dcbe2e6a03eb5e1a) means no one can upgrade to 3.10 until rspec-support gets to 3.10.3.

Maybe I'm missing some new idiosyncrasy in the dependency relationships for rspec, but setting this back to 0 allows upgrade to 3.10 since any patch level will be accepted.

Edit: Turns out my rspec-rails dependency blocks getting up to 3.10 on this gem, so I stumbled backwards into this. Thanks for the clarifying comment, @JonRowe !