add name property to hook schema

[davidjgoss]

Summary

• Add name as an optional field on the Hook schema
• Teach fake-cucumber to populate that field
• Add case to the compatibility kit

Motivation and Context

First part of cucumber/messages#73.

How Has This Been Tested?

via the compatibility kit.

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue).
• New feature (non-breaking change which adds functionality).
• Breaking change (fix or feature that would cause existing functionality to not work as expected).

Checklist:

• The change has been ported to Java.
• The change has been ported to Ruby.
• The change has been ported to JavaScript.
• The change has been ported to Go.
• The change has been ported to .NET.
• I've added tests for my code.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have updated the CHANGELOG accordingly.

[aslakhellesoy]

Rather than trying to make the JSON formatter work, I think we should delete it.

It was created as a fallback solution when we decided to remove the native JSON formatters. Now that we're keeping them, this tool is obsolete.

[davidjgoss]

@aslakhellesoy well okay then! I'll raise a separate PR for that. I do love to delete things.

[aurelien-reeves]

Looks good 🥳