chore(deps): bump syn from 2.0.104 to 2.0.111

[dependabot]

Bumps syn from 2.0.104 to 2.0.111.

Release notes

Sourced from syn's releases.

2.0.111

• Allow first argument of braced!, bracketed!, parenthesized! to be an otherwise unused variable (#1946)

2.0.110

• Tweaks to improve build speed (#1939, thanks @​dishmaker)
• Make syn::ext::IdentExt::unraw available without "parsing" feature (#1940)
• Support parsing syn::Meta followed by => (#1944)

2.0.109

• Tweaks to improve build speed (#1927, #1928, #1930, #1932, #1934, thanks @​dishmaker)

2.0.108

• Parse unrecognized or invalid literals as Lit::Verbatim (#1925)

2.0.107

• Improve panic message when constructing a LitInt, LitFloat, or Lit from invalid syntax (#1917)
• Improve panic message on Punctuated index out of bounds (#1922)

2.0.106

• Replace ~const syntax with [const] conditionally const syntax in trait bounds (#1896, rust-lang/rust#139858)
• Support conditionally const impl Trait types (#1897)
• Reject polarity modifier and lifetime binder used in the same trait bound (#1899, rust-lang/rust#127054)
• Parse const trait bounds with bound lifetimes (#1902)
• Parse bound lifetimes with lifetime bounds (#1903)
• Allow type parameters and const parameters in trait bounds and generic closures (#1904, #1907, #1908, #1909)

2.0.105

• Disallow "negative" inherent impls like impl !T {} (#1881, rust-lang/rust#144386)

Commits

• 4e50867 Release 2.0.111
• c57334b Merge pull request #1946 from dtolnay/unusedgroup
• 6a43384 Suppress unused variable warning on variables used in group macro
• 7ff6c86 Update actions/checkout@v5 -> v6
• 59ce6bb Update test suite to nightly-2025-11-20
• 3d91b8c Update test suite to nightly-2025-11-11
• 2d87fca Delete version requirement from readme
• 1c8cabe Release 2.0.110
• 8ef195b Merge pull request #1944 from dtolnay/metaarrow
• 9ab4aef Support parsing Meta followed by fat arrow
• Additional commits viewable in compare view

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