Eventually does not work with RSpec expect statements

[Adam Steel]

eventually(40) { expect(roles.user).to see :list_item }

The issue is that when the expectation fails, it throws RSpec::Expectations::ExpectationNotMetError, which subclasses Exception, not StandardError. Eventually only catches StandardError. This means the code above waits only as long as the Capybara wait time (defined in Dill's see?), not the 40 seconds that have been given the eventually

Here's the PR that changed the subclass.
rspec/rspec-expectations#426

[Adam Steel]

Resolved with #107