Bump syn from 0.15.29 to 0.15.44

[dependabot-preview]

Bumps syn from 0.15.29 to 0.15.44.

Release notes

Sourced from syn's releases.

0.15.44

• Support compiling on WASI target (#689, thanks @michaelvoronov)

0.15.43

• Fix support for rustc 1.27 through 1.29 which were failing to build Syn due to benchmarks that use 2018 edition

0.15.42

• Accept a where-predicate with empty bounds list at end of input; useful for:

  let mut predicate: WherePredicate = parse_quote!(#ty:);
  // then conditionally add bounds

0.15.41

• Parse async trait methods
• Parse async nested functions in statement position

0.15.40

• Fix broken doc links by switching to intra doc links (#670, #671)

0.15.39

• Add a rule for Token![$] to refer to the syn::token::Dollar punctuation token (#655, thanks @jix)
• Add Macro::parse_body method to parse tokens inside a macro invocation syntax tree node in a way that produces a useful span when the tokens are empty

0.15.38

• Add syn::parse::discouraged::Speculative extension trait to support speculative parsing against ParseStream (#649, thanks @CAD97)

0.15.37

• Emit inclusive ranges as ..= rather than the deprecated ... (#652, thanks @jebrosen)

0.15.36

• Fix order of const async unsafe (#642, thanks @felixrabe)
• Loosen lifetime requirement for group parsing macros (#648, thanks @samsartor)

0.15.35

• Transpose unsafe async fn to async unsafe fn (rust-lang/rust#61319)

0.15.34

• Implement Parse for individual Expr variants (#629, thanks @bstrie)

0.15.33

• Implement Clone for Punctuated's iterator types (#489)
• Extension method to unraw an ident (#625)
• Function to peek any ident: input.peek(Ident::peek_any) (#626)

0.15.32

• Add a custom_punctuation! macro for defining parsers of multi-character punctuation (#620, thanks @CAD97)

... (truncated)

Commits

• 6d798b6 Release 0.15.44
• 46ba850 add WASI support
• 3406f81 Release 0.15.43
• 7bc9a79 Move benches out of main project
• b48a2b9 Release 0.15.42
• 1e072a7 Accept empty bound list at end of input
• d11d8c9 Release 0.15.41
• dd52e0a Allow parsing async unsafe fn as item in block
• 9082c76 Fix order of async unsafe specifiers in trait fn
• f4b0987 Allow trait methods to be async
• Additional commits viewable in compare view

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