applyPatch in json-patch mutates patch Operations typed as readonly

[atsjo]

Since all my state is frozen I discovered this by an exception, and tracked it down to the "replace" operation. I can see deepClone is used for the "add" operation, and prepared a PR for a similar fix to the "replace" operation.

• fix(json-patch): create deep copy of "replace" operation value #812

And thanx @streamich for a very powerful library! I have implemented json-patch with ot and string diff support, and made 2 PR's for the issues I found, as I can see you are very busy with json-crdt now...

[streamich]

Thanks, merged!