Consider releasing 2.5.1

[inglesp]

I'd love to be able to make use of #216, but can't until a new version of the gem is released. (I've got another gem that depends on this gem, and you can't put a link to github in a gemspec...)

Is there anything I can do to help get this released?

[RST-J]

Generally it would be no problem to release a new version, I think.
But if we do that I would like to get some more open things in:

• Updated to addressable 2.3.7 #226 updated addressable dependency
• Made sure we really do update the common test suite before test runs #224 ensured update for common test suite
• Added Ruby 2.2 to the build matrix #223 adding Ruby 2.2. to the Travis build
• Renamed variable in oneOf to avoid name clash #221 renamed variable
• Issue with Fixnum and Float in enum #219 issue with integer and fload equality
• Remove support for alternate JSON backends #206 remove support for alternate JSON backends

They are all ready and need only one more approval and in case of #206 a minor adjustment.

[RST-J]

I prepared a milestone and a (visible) task list in #228.