build(deps): bump syn from 2.0.13 to 2.0.22

[dependabot[bot]]

Bumps syn from 2.0.13 to 2.0.22.

Release notes

Sourced from syn's releases.

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)

Commits

• 0ca3547 Release 2.0.22
• 62bd232 Merge pull request #1475 from dtolnay/litcstr
• fe0042e Support parsing c-str literals
• cdacef7 Release 2.0.21
• a5f92e1 Merge pull request #1474 from dtolnay/bytestrspaces
• fef64da Stricter parsing of string_continue escape in cooked byte string literal
• 0828793 Merge pull request #1473 from dtolnay/backslashx
• 211ee86 Max \x escape allowed in cooked string literal is 0x7F
• 0d55124 Release 2.0.20
• d422546 Merge pull request 1469 from billy1624/point-to-latest-docs
• Additional commits viewable in compare view

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