fix(deps): update rust crate syn to v2.0.91

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
syn	dependencies	patch	2.0.31 -> 2.0.91

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Release Notes

dtolnay/syn (syn)

v2.0.91

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• Support parsing Vec<Arm> using parse_quote! (#​1796, #​1797)

v2.0.90

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• Fix automatic parenthesization of subexpressions containing outer attributes, such as (#[attr] thing).field (#​1785)
• Fix automatic parenthesization of function calls via a struct field, such as (thing.field)() and thing.0() (#​1786)

v2.0.89

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• Fix "compiler/fallback mismatch 949" panic (https://github.com/dtolnay/proc-macro2/issues/483)

v2.0.88

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• Improve error recovery in parse_str (#​1783)

v2.0.87

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• Add Cursor::any_group (#​1777)
• Add Expr::peek (#​1778)
• Improve syntax support for enum discriminant expressions in non-"full" mode (#​1779)

v2.0.86

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• Support peeking the end of a parse stream (#​1689)
• Allow parse_quote! to produce Vec<Attribute> (#​1775)

v2.0.85

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• Preserve extern static unsafety in ForeignItem::Verbatim (#​1773)

v2.0.84

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• Parse safe and explicitly unsafe extern items (#​1768, https://github.com/rust-lang/rust/issues/123743, https://github.com/rust-lang/rfcs/pull/3484)
• Parse self captures: impl Sized + use<Self> (#​1772)

v2.0.83

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• Documentation improvements

v2.0.82

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• Provide Parse impls for PreciseCapture and CapturedParam (#​1757, #​1758)
• Support parsing unsafe attributes (#​1759)
• Add Fold and VisitMut methods for Vec<Attribute> (#​1762)

v2.0.81

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• Add TypeParamBound::PreciseCapture to represent precise capture syntax impl Trait + use<'a, T> (#​1752, #​1753, #​1754)

v2.0.80

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• Add Expr::RawAddr (#​1743)
• Reject precise captures and ~const in inappropriate syntax positions (#​1747)
• Reject trait bound containing only precise capture (#​1748)

v2.0.79

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• Fix infinite loop on parsing chained ranges (#​1741)
• Fix panic in parsing use items containing absolute paths (#​1742)

v2.0.78

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• Fix infinite loop on chained comparison (#​1739)

v2.0.77

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• Support parsing Expr::Tuple in non-"full" mode (#​1727)

v2.0.76

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• Enforce that tail call become keyword is followed by an expression (#​1725)

v2.0.75

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• Automatically fill in missing turbofish when printing ExprPath and other paths in expression position (#​1722)

v2.0.74

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• Fix "temporary is dropped and runs the destructor for type `impl Iterator`" regression affecting certain use of Generics iterator methods (#​1719)

v2.0.73

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• Support parsing unnamed C varargs within function pointer types (#​1711)
• Improve synthesized error message on unexpected tokens at the end of the expected contents of a delimited group (#​1713)
• Support parsing unstable tail call syntax (#​1714, https://github.com/rust-lang/rust/issues/112788)
• Add Fields::members iterator (#​1716, thanks @​Fancyflame)

v2.0.72

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• Parse use<'a, T> precise capturing bounds (#​1707, thanks @​compiler-errors)

v2.0.71

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• Do not require mutable borrow in Punctuated::get() (#​1706, thanks @​lemunozm)

v2.0.70

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• Improve parenthesization of closures, jumps, ranges, chained comparisons, and let (#​1694, #​1695, #​1698, #​1699, #​1700)

v2.0.69

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• Correctly parenthesize labeled loops inside a break value (#​1692)
• Add Punctuated::get and get_mut (#​1693)

v2.0.68

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• Improve panic location when parse_quote! parses invalid syntax (#​1690, thanks @​stepancheg)
• More efficient peek implementation for Group and Lifetime (#​1687)

v2.0.67

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• Produce more accurate error message locations for errors located at the end of a nested group (#​1679, #​1680)
• Support peeking LitCStr in ParseStream::peek (#​1682)

v2.0.66

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• Allow braced structs when parsing ExprLet (#​1671)

v2.0.65

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• Optimize the implementation of Fold to compile faster (#​1666, #​1667, #​1668)

v2.0.64

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• Support using ParseBuffer across catch_unwind (#​1646)
• Validate that the expression in a let-else ends in brace as required by rustc (#​1648, #​1649)
• Legalize invalid const generic arguments by wrapping in braces (#​1654, #​1655)
• Fix some expression precedence edge cases involving break and return in loop headers (#​1656)
• Always print closure bodies with a brace when the closure has an explicit return type (#​1658)
• Automatically insert necessary parentheses in ToTokens for Expr when required by expression precedence (#​1659)
• Support struct literal syntax in match guard expressions (#​1662)

v2.0.63

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• Parse and print long if-else-if chains without reliance on deep recursion to avoid overflowing stack (#​1644, #​1645)

v2.0.62

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• Reject invalid unparenthesized range and comparison operator expressions (#​1642, #​1643)

v2.0.61

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• Check for legal binding name in the ident of Pat::Ident (#​1627)
• Resolve unexpected_cfgs warning (#​1635)

v2.0.60

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• Improve how None-delimited groups are counted by peek (#​1625)

v2.0.59

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• Parse c"…" and cr"…" C-string literal syntax as Lit::CStr (#​1502)

v2.0.58

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• Support $ in custom_punctuation! macro (#​1611)

v2.0.57

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• Eliminate dependency on quote when built with default-features disabled and the "proc-macro" feature enabled (#​1608, thanks @​BD103)

v2.0.56

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• Apply RUSTC_WORKSPACE_WRAPPER when deciding whether to run nightly-only tests (#​1605)

v2.0.55

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• Restore compatibility with rustc 1.56 through 1.59 (#​1603)

v2.0.54

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• Fix dead code warning in generated code when using custom_keyword! with syn's "printing" feature disabled (#​1602)

v2.0.53

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• Implement Copy, Clone, and ToTokens for syn::parse::Nothing (#​1597)

v2.0.52

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• Add an expression parser that uses match-arm's boundary rules (#​1593)

v2.0.51

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• Resolve non_local_definitions warnings in generated code under rustc 1.78-nightly

v2.0.50

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• Fix unused_imports warnings when compiled by rustc 1.78

v2.0.49

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• Improve error location when parsing from an empty string literal using LitStr::parse (#​1590)

v2.0.48

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• Improve error message on unexpected token after else (#​1578)

v2.0.47

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• Improve error messages related to proc_macro::LexError (#​1575)

v2.0.46

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• Update proc-macro2 to fix caching issue when using a rustc-wrapper such as sccache

v2.0.45

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• Parse unsupported expressions in enum discriminants of DeriveInput as Expr::Verbatim in non-"full" mode, instead of error (#​1513)
• Support parsing PatType with parse_quote! (#​1573)

v2.0.44

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• Documentation improvements

v2.0.43

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• Insert trailing comma if not already present when printing a 1-tuple in pattern position (#​1553)

v2.0.42

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• Documentation improvements

v2.0.41

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• Support parsing syn::Field in parse_quote! (#​1548)

v2.0.40

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• Fix some edge cases of handling None-delimited groups in expression parser (#​1539, #​1541, #​1542, #​1543, #​1544, #​1545)

v2.0.39

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• Fix parsing of return expression in match guards (#​1528)
• Improve error message on labeled loop as value expression for break (#​1531)

v2.0.38

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• Fix "method 'peek' has an incompatible type for trait" error when defining bool as a custom keyword (#​1518, thanks @​Vanille-N)

v2.0.37

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• Work around incorrect future compatibility warning in rustc 1.74.0-nightly

v2.0.36

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• Restore compatibility with --generate-link-to-definition documentation builds (#​1514)

v2.0.35

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

v2.0.34

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• Documentation improvements

v2.0.33

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

v2.0.32

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

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