Bump syn from 1.0.21 to 1.0.24

[dependabot-preview[bot]]

Bumps syn from 1.0.21 to 1.0.24.

Release notes

Sourced from syn's releases.

1.0.24

• Parse mut self receiver in function pointer type (#812, #814)
• Parse const trait impls (#813)
• Improve error reporting inside struct expressions and struct patterns (#818)

1.0.23

• Parse inner attributes in traits (#803)
• Parse const underscore in traits and impls (#804)
• Implement Extend for Error (#805)
• Parse Or patterns (#806)
• Parse outer attributes on Expr* structs (#807)
• Parse top level const/static without value (#808)
• Parse syntactically accepted functions (#809)
• Parse extern static with value (#810)

Thanks @taiki-e for all of these.

1.0.22

• Parse literal suffix on byte string, byte, and char literal tokens: br#"..."#suffix, b'?'suffix, '?'suffix (#799, #800)

Commits

• 826551e Release 1.0.24
• 4d38845 Merge pull request #818 from dtolnay/struct
• 0840d17 Error earlier on unexpected token in struct expr
• 815b0bc Merge pull request #815 from taiki-e/local_inner_macros
• 87287c0 Replace local_inner_macros with $crate
• 4e99130 Merge pull request #814 from dtolnay/mutself
• 26d7bdb Add mut self parsing test
• 7540661 Disallow fn(mut self::T)
• c64ac72 Disallow fn(mut self: mut self)
• 63c4bd5 Disallow fn(mut self: ...)
• Additional commits viewable in compare view

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[dependabot-preview[bot]]

Superseded by #116.