to_number accepts arguments of type json.Number

[arl]

to_number implementation fails to cast arguments of the standard type json.Number.
All numbers are converted to json.Number (a mere string) when UseNumber has been set on the json Decoder.

[arl]

More context on the issue (and why the fix):
We sometimes need to set json.UseNumber on a json decoder. However, when we do so, go-jmespath fails to decode JSON numbers because jpfToNumber doesn't handle it.
The PR fixes that

[suntong]

I think this PR is reasonable and should be merged.

@jamesls, what's your thought about it?

[springcomp]

@arl I’m working on expanding this implementation to bring it up on par to the latest version of JMESPath Community, I would be interested in taking this PR.

Is there a specific compliance test that would show the failure before this PR gets merged ?

[arl]

Is there a specific compliance test that would show the failure before this PR gets merged ?

Hi @springcomp yes there should be a test.
I'll look into it, should be relatively easy, i'd just need to look at the code a bit since I've opened the PR it was 1.5 year ago.
Thanks for doing this btw