Bug: string fields parsed incorrectly in structs nested with json:",inline"

[willfindlay]

When you have a struct nested with json:",inline" that has a string field, attempting to unmarshal an unquoted number into that string field will fail with cannot unmarshal number into Go struct field [...] of type string. This is a breakage with the YAML spec.

The following minimal example illustrates the problem: https://go.dev/play/p/enZcSLWe9jo

As you can see, unmarshaling Foo succeeds, but Bar fails with:

failed to unmarshal bar:  error unmarshaling JSON: while decoding JSON: json: cannot unmarshal number into Go struct field Bar.fooStr of type string

Changing the spec to quote the fooStr field makes unmarshaling succeed for both: https://go.dev/play/p/_B5QaRpxiPz

[willfindlay]

Apologies, this is a duplicate of #58