v17.0.0

Added

• Added #to_envelope for Cucumber::Core::Gherkin::Document (#329)

Changed

• Refactored the internal base Event class to reduce complexity and make it more flexible for future use (No user facing changes)
• Refactored the Result classes to be more simplified and one class per file
• Changed the base event inheritance to a new base class structure
• Refactored some internals of the library to be slightly more performant (Including removing redundant nil checks)
• Permit cucumber-tag-expressions up to v10
• Change to use worst Test Step result as the Test Case result
  (#317)

Removed

• Strict configuration has been removed from all Result classes
• Removed the ability to list event attributes (Only the #to_h method now remains for this purpose)