README is missing `path` example

[Jan Piotrowski]

Seems path can be used to specify where in the json the version should be written to? If that is correct, then it would be nice if there was an example in the README to make this more obvious.

[Lars Kappert]

Thanks, indeed. Had no idea anyone would actually need it, but please open a PR for this or I'll do it myself soon.

[Jan Piotrowski]

Thanks @webpro