Update proc-macro2 to fix compilation error with nightly

[ia0]

See rust-lang/rust#113152 for more details.

This commit was generated by:

find . -name Cargo.toml -execdir cargo update -p proc-macro2 \;

[wmmc88]

@ia0 @panekj cargo install taplo-cli --locked still fails rn on nightly since no release has been made since this pr. could you do a release of taplo so that this fix is released?

[ia0]

Yes I'm also hitting this issue and having to work around it. And it's even more problematic since json_value_merge released a breaking change in 1.2.0 (jmfiaschi/json_value_merge#18). I would suggest bumping that to 2.0.0 first then doing a release. I've create #473 to track that.