Bump syn from 2.0.29 to 2.0.35

[dependabot[bot]]

Bumps syn from 2.0.29 to 2.0.35.

Release notes

Sourced from syn's releases.

2.0.35

• Make rust-analyzer produce preferred brackets for invocations of Token! macro (#1510, #1512)

2.0.34

• Documentation improvements

2.0.33

• Special handling for the (/*ERROR*/) placeholder that rustc uses for macros that fail to expand

2.0.32

• Add Path::require_ident accessor (#1496, thanks @​Fancyflame)

2.0.31

• Parse generics and where-clause on const items (rust-lang/rust#113521)

2.0.30

• Parse unnamed struct/union type syntax (rust-lang/rust#49804)

Commits

• ce360ff Release 2.0.35
• 23736bd Merge pull request #1512 from dtolnay/tokendoc
• 6f6b004 Improve docs of Token! macro
• 319433e Merge pull request #1510 from ModProg/patch-3
• 975ce0b Release 2.0.34
• 858e578 Merge pull request #1511 from dtolnay/notdoc
• 1b0d7f8 Add cfg(not(doc)) to doc(hidden) functions
• 04c9972 Recurse over fold expr in just one place
• 2dc903f Factor out function to add syn parens
• bf5b461 Enhance check for parenthesization of let-chains
• Additional commits viewable in compare view

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[dependabot[bot]]

Superseded by #267.