Bump syn from 0.15.44 to 1.0.86

[dependabot]

Bumps syn from 0.15.44 to 1.0.86.

Release notes

Sourced from syn's releases.

1.0.86

• Add support for parsing if- and while-let-chains (RFC 2497)

1.0.85

• Add token() method to each variant of syn::Lit to expose the underlying token representation with original formatting

1.0.84

• Add parse_quote_spanned! macro which is a combination parse_quote! + quote_spanned!

1.0.83

• Fix panic parsing trait impl with qself in trait type: impl <Thing<>>::Trait for Type {} (#1109)
• Preserve attributes on let-else stmt: #[attr] let pat = val else { return } (#1110)

1.0.82

• Support parenthesized generic argument syntax with :: disambiguator: Fn::() -> ! (#1096)

1.0.81

• Support arbitrary precision negative literal tokens on rustc 1.56+ (#1087, #1088)

1.0.80

• Parse unstable ~const syntax in where-clauses (#1083, tracking issue rust-lang/rust#67792)

1.0.79

• Support trailing + in dyn Trait syntax, including bare (non-dyn) pre-2018 trait object syntax (#1075, #1077, #1078, #1079, #1080, #1081)

1.0.78

• Parse trailing + in the bounds of impl Trait type (#1073)

1.0.77

• Match Rust 1.57+'s parsing of dot and question mark after a curly braced macro invocation (#1068)

1.0.76

• Parse unstable let–else syntax (#1050, #1057)
• Parse qualified braced variant expressions and patterns: <E>::V {..} (#1058, #1059)
• Fix precedence of outer attributes in front of an assignment expression in statement position (#1060)

1.0.75

• Improve spans on a method without body inside an impl block
• Documentation improvements (#922, thanks @​Tamschi)

1.0.74

• Reject for<'a> dyn Trait<'a> syntax; the correct representation is dyn for<'a> Trait<'a> (#1042)

1.0.73

• Add From<Ident>, From<Index>, From<usize> for Member (#1038, thanks @​m-ou-se)

1.0.72

• Parse const generics which use value of a previous const generic parameter as a default value (#1027)

1.0.71

... (truncated)

Commits

• 7ff292d Release 1.0.86
• 0885920 Merge pull request #1128 from dtolnay/letchain
• dd82fff Reduce predence of rhs of let-expr
• 2468457 Merge pull request #1127 from dtolnay/staticasync
• 5aeec41 Update generated code for ExprClosure field order
• fc0c370 Fix static async closure keyword order
• 6a8bf28 Merge pull request #1126 from dtolnay/tests
• 2d96ccd Categorize most recent group of upstream's tests
• cb8d9c4 Advance test suite past the let-chains PR
• 089e3c9 Update ui test suite to nightly-2022-01-19
• Additional commits viewable in compare view

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