json5 is abandoned

[gtema]

json5 crate has been declared abandoned and there is https://rustsec.org/advisories/RUSTSEC-2025-0120

[epage]

The other options do not seem very mature at this time so I think for now we will stick with json5 as long as there isn't an identifiable problem with it.

[polarathene]

FWIW the maintainer has chimed in that they're back to maintaining the project: callum-oakley/json5-rs#51 (comment)