Introduces two new matchers: #10 and #11

• Requires "stimulus_reflex" to prevent undefined method StimulusReflex if SR gem isn't loaded first
• Makes URL an optional argument to build_reflex by using fetch instead of dig

There was an issue with the last release where SR was an open-ended dependency. This will require you to use 3.3.0 or above without also upgrading your version.

• #4 Add stimulus_reflex as dependency to gemspec
• #7 Update for compatibility with stimulus_reflex 3.4
• #8 Pass method_name to reflex class
• #9 Remove _channel_name