apply patch

[benitogf]

found that we have two solutions on go for jsonpatch, one generates and the other one applies, made a humble attempt at joining them here still needs:

• refactoring to remove duplicated types https://github.com/benitogf/jsonpatch/blob/master/jsonpatch.go#L14 == https://github.com/benitogf/jsonpatch/blob/master/patch.go#L34
• support for generating collections (Array of Objects) patches https://github.com/benitogf/jsonpatch/blob/master/jsonpatch.go#L64

would appreciate any feedback or help on this one

Thanks 🏭