feat: Support for XPATH

[maxlerebourg]

Is your feature request related to a problem? Please describe it.
When I retrieve deployed_version which responds:

{ "bar" : [ { "version" : "0.0.1" } ] }

with parameter json = "bar[0].version" || "bar.0.version" || "bar._0.version".
This does not work as expected, the array cannot be explored.
The functionality I'm looking for is the implementation of a solution to easily crawl json.

Describe the solution you want
I've started trying to rewrite your implementation of json usage, without success.
And as I come from js/ts development, I thought of the xpath equivalent for golang and found go xpath implementation that you can use for html, json and/or xml.

Additional context
Maybe you'll need a new parameter for deployed_release: xpath, so as not to break the old behavior of deployed_release: json.

[JosephKav]

👋, I have a PR (#294) that will add support for arrays in the JSON, e.g. bar[0].version. I don't see a worthwhile benefit to xPath currently, so would rather this than use a package that could drop in support

[maxlerebourg]

That's perfect, thanks a lot. I hope it will be released soon.