Bump syn from 0.15.40 to 1.0.55

[dependabot-preview]

Bumps syn from 0.15.40 to 1.0.55.

Release notes

Sourced from syn's releases.

1.0.55

• Preserve None-delimited group around macro metavariable when parsing T<$ty> (#944, #945)

1.0.54

• Fix parsing of impl items with macro metavariable in the trait path: impl $trait for Type {...} (#942)

1.0.53

• Parse impl !Trait {...} syntax (#936)

1.0.52

• Parse unsafe extern block syntax (#918)
• Parse unsafe mod syntax (#919)
• Parse const {...} block syntax (#921)
• Parse destructuring assignment syntax (#933)

1.0.51

• Allow parsing signatures in which const generic params appear in front of lifetime params (#920)

1.0.50

• Apply doc(cfg(...)) on feature gated APIs for docs.rs-rendered documentation (#925)

1.0.49

• Fix parsing async functions inside None-delimited groups in a statement context (#916)

1.0.48

• Rebuild for https://astexplorer.net

1.0.47

• Documentation improvements

1.0.46

• Fix parsing structured attributes that contain nested absolute paths, such as #[derive(::serde::Serialize)] (#909)

1.0.45

• Provide more detailed error messages when parsing specific literal kind (#908)

1.0.44

• Fix some parsing of patterns inside of None-delimited groups (#907)

1.0.43

• Add Parse impl for syn::Signature

1.0.42

• Fix several bugs involving unusual suffixes on integer and floating point literal tokens (#898, #899, #900)

1.0.41

• Fix panic on printing an incomplete (having fewer path segments than originally parsed with) qualified path (ExprPath, PatPath, TypePath containing QSelf) (#891, thanks @taiki-e)
• Fix panic triggered by syntactically invalid overflowing negative float literal after . in a field access position, e.g. let _ = obj.-0.9E999999 (#895, thanks @sameer)
• Enable using parse_macro_input! with a Parser function rather than type having a Parse impl (#896, thanks @sbrocket)

Commits

• 81a3d51 Release 1.0.55
• ae7d47f Merge pull request #945 from dtolnay/path
• d5d2990 Add test of $ty::<T>
• 0a2e4e3 Add test of $ty::Item
• f492305 Preserve None-delimited group around path type
• 5822aea Add test of path type wrapped in None-delimited group
• e7e4261 Merge pull request 944 from Aaron1011/fix/ty-group-peek
• ac3905b Fix parsing of path type wrapped in a None-delimited group
• 1eabf0e Force tar dependency >=0.4.16
• 5c2886d Simplify Str token identification
• Additional commits viewable in compare view

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[dependabot-preview]

Superseded by #625.