Update Rust crate proc-macro2 to v1.0.90

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
proc-macro2	dependencies	patch	1.0.89 -> 1.0.90
proc-macro2	build-dependencies	patch	1.0.89 -> 1.0.90

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Release Notes

dtolnay/proc-macro2 (proc-macro2)

### [`v1.0.90`](https://redirect.github.com/dtolnay/proc-macro2/releases/tag/1.0.90) [Compare Source](https://redirect.github.com/dtolnay/proc-macro2/compare/1.0.89...1.0.90) - Improve error recovery in TokenStream's and Literal's FromStr implementations to work around [https://github.com/rust-lang/rust/issues/58736](https://redirect.github.com/rust-lang/rust/issues/58736) such that rustc does not poison compilation on codepaths that should be recoverable errors ([#​477](https://redirect.github.com/dtolnay/proc-macro2/issues/477), [#​478](https://redirect.github.com/dtolnay/proc-macro2/issues/478), [#​479](https://redirect.github.com/dtolnay/proc-macro2/issues/479), [#​480](https://redirect.github.com/dtolnay/proc-macro2/issues/480), [#​481](https://redirect.github.com/dtolnay/proc-macro2/issues/481), [#​482](https://redirect.github.com/dtolnay/proc-macro2/issues/482))

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