Not compatible with draft 10

[warpech]

I love this library, but it is not compatible with the current version of the draft: http://tools.ietf.org/html/draft-ietf-appsawg-json-patch-10

Do you have a fixed version that you could upload? If not then I can work on that.

I saw that tests are already updated.

[warpech]

I made a pull request that fixes this issue: #2