Upgrade to support Draft 10 syntax

[warpech]

Thanks for a great library!

I made a few changes that make 100% tests from https://github.com/mikemccabe/json-patch-tests (master) passing.

Works for me so may work for others as well.

[mikemccabe]

Thank you! I'll try to review it soon. Have you checked it against https://github.com/json-patch/json-patch-tests ?

[warpech]

Sorry, I only tested against https://github.com/mikemccabe/json-patch-tests. I didn't realize that the other repo is now the leading one.

I made my changes because I needed as PHP counterpart to the JavaScript implementation I contributed to (Starcounter-Jack/JSON-Patch)

[bendiy]

I merged this Pull Request into #3 and ran the tests against https://github.com/json-patch/json-patch-tests. Works fine.

[bendiy]

JsonPatch::diff($doc1, $doc2);

@warpech This is still returning Draft 2 style patches after merging in your changes:

[
  {
    "add":"\/comments\/0",
    "value":{
      "text":"test",
      "created":"2013-06-14T18:50:21.904Z",
    }
  }
]

I'll update diff() to the final RFC style next week.

It should look like:

[
  {
    "op":"add",
    "path":"\/comments\/0",
    "value":{
      "text":"test",
      "created":"2013-06-14T18:50:21.904Z",
    }
  }
]

This does seem to work fine when applying final RFC style patches:

JsonPatch::patch($doc1, $patch);

[bendiy]

diff() is now working as expected. See #3