Bump syn from 1.0.109 to 2.0.23

[dependabot[bot]]

Bumps syn from 1.0.109 to 2.0.23.

Release notes

Sourced from syn's releases.

2.0.23

• Preserve attributes on verbatim Item in statement position (#1476)
• Support generic_const_exprs where-clauses such as where [(); { T::COUNT }]: in non-"full" mode (#1478)

2.0.22

• Parse c"…" c-string literals (tracking issue: rust-lang/rust#105723)

2.0.21

• Fix value computed by LitByteStr::value in the case of a cooked byte string literal containing form feed or vertical tab characters following an escaped newline (#1474)

2.0.20

• Documentation improvements

2.0.19

• Improve rendering of compile errors within 2015-edition code calling a 2018+ edition proc macro (#1467, thanks @​danielhenrymantilla)

2.0.18

• Permit empty attr in syn::meta::parser (#1460)

2.0.17

• Enable proc_macro support on wasm targets (#1459)

2.0.16

• Parse builtin # syntax as Expr::Verbatim (rust-lang/rust#110680, #1454)

2.0.15

• Ensure Type::Tuple of length 1 prints as a tuple even if trailing comma is not provided in the Punctuated (#1444, thanks @​Fancyflame)

2.0.14

• Add Punctuated::pop_punct() (#1442, thanks @​programmerjake)

2.0.13

• Improve spans of Expr::Field parsed from a float Literal (#1433, #1436)

2.0.12

• Refer to compile_error! by absolute path in token stream produced by syn::Error::to_compile_error (#1431, thanks @​smoelius)

2.0.11

• Improve error message on empty parens inside parse_nested_meta (#1428)

2.0.10

• Fix visibility being parsed incorrectly on macro invocations inside of a trait

2.0.9

• Disallow type items in an extern block, trait, or module from being marked default

2.0.8

• Treat try keyword as 2015-edition identifier in definition of try macro (#1422)

2.0.7

... (truncated)

Commits

• f3cd37a Release 2.0.23
• e9a3846 Merge pull request #1478 from dtolnay/nonfullblock
• 5325bb6 Parse block expr as verbatim in non-full mode
• 31e4119 Allow caller to keep using begin buffer after verbatim::between
• 1316ec6 Merge pull request #1476 from dtolnay/verbatimattrs
• 56226a5 Preserve attributes on verbatim Item in statement position
• 0ca3547 Release 2.0.22
• 62bd232 Merge pull request #1475 from dtolnay/litcstr
• fe0042e Support parsing c-str literals
• cdacef7 Release 2.0.21
• Additional commits viewable in compare view

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