Bump syn from 1.0.81 to 1.0.90

[dependabot]

Bumps syn from 1.0.81 to 1.0.90.

Release notes

Sourced from syn's releases.

1.0.90

• Update recommended exhaustive matching idiom to use non_exhaustive_omitted_patterns lint:

  match expr {
      Expr::Array(e) => {…}
      Expr::Assign(e) => {…}
      ...
      Expr::Yield(e) => {…}
  #[cfg_attr(test, deny(non_exhaustive_omitted_patterns))]
  _ => {/* some sane fallback */}
  
  }

1.0.89

• Remove support for inner attributes on non-block expressions (#1146, rust-lang/rust#83312)
• Fix panic on comma after mut self in a bare fn type (#1148)

1.0.88

• Parse .. pattern in pattern of let (#1136)
• Parse for<…> lifetime introducer on closures (#1135)
• Reject postfix operators after cast (#1117)
• Implement extra-traits for Nothing (#1144)

1.0.87

• Parse trait bounds containing associated constant constraint (#1138)
• Change syntax of where-clauses on generic associated types (#1071, rust-lang/rust#89122)

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)

Commits

• a0f0bb3 Release 1.0.90
• be520c1 Merge pull request #1067 from dtolnay/nonexhaustive
• c6ce512 Switch non exhaustive syntax tree enums to use #[non_exhaustive]
• 390e0c1 Move path printing to a pub(crate) function
• d545093 Fix up variable names in exhaustive matching idiom comments
• c1a63c4 Fix unused associated constant warning
• 3d72c80 Factor out placeholder to DUMMY const
• a0ed0d3 Replace placeholder to avoid round trip over proc macro bridge
• a9759cf Replace meaningless placeholder with one of the legit expr variants
• 5796d98 Update generated modules at prettyplease 0.1.8
• Additional commits viewable in compare view

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[dependabot]

Superseded by #99.