Bump proc-macro2 from 1.0.29 to 1.0.37

[dependabot[bot]]

Bumps proc-macro2 from 1.0.29 to 1.0.37.

Release notes

Sourced from proc-macro2's releases.

1.0.36

• Improve performance of creating literal tokens through quote! macro

1.0.35

• Try to diagnose "cannot find type SourceFile" errors better (#311)

1.0.34

• Work around doc build failure due to docs.rs flags change (#310)

1.0.33

• Enable Group::span_open/span_close on Rust 1.55+ to reflect their stabilization in rustc (#305, rust-lang/rust#86136)

1.0.32

• Support negative int and float literals in FromStr (rust-lang/rust#87262, #301)

1.0.31

• Update Cargo metadata to new repository location

1.0.30

• Use proc_macro::is_available on Rust 1.57+ to support projects built with panic=abort or cg_clif (#300, thanks @​bjorn3)

Commits

• df73b6a Release 1.0.37
• f09fb00 Merge pull request #325 from dtolnay/xid
• affce36 Rely on unicode-xid to optimize ASCII properly
• 1bbc8b1 Merge pull request #323 from dtolnay/build
• 43cd331 Delete RUSTFLAGS fallback from build script
• 08ce6ff Merge pull request #322 from dtolnay/build
• 3e901db Simplify env var handling in build script
• 349596b Include global rustflags in rustflags override
• 878cd24 Detect warnings in CI
• 7ecea3b Release 1.0.36
• Additional commits viewable in compare view

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[dependabot[bot]]

Superseded by #232.