Improve tests
Add convenience authorizer method
:fire: Monkeypatch Rspec to resolve compatibility issues

So guard-rspec is incompatible with changes in https://github.com/rspec/rspec-core/commit/b2fea38cf68f6b7df3fd9388910de2e19c067e0d
The obvious resort would be to switch to edge version of guard-rspec but then you end up with compatibility issues with rspec versions
(which is very odd). So as of now, I just monkeypatch RSpec::Core::ConfigurationOptions to alias options as parse_options (previous name)