Bump syn from 1.0.109 to 2.0.15

[dependabot]

Bumps syn from 1.0.109 to 2.0.15.

Release notes

Sourced from syn's releases.

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

• Fix parsing of mut self inside of Type::BareFn

2.0.6

• Improve error message on missing ';' between statements (#1419)
• Keep non-brace macro invocations in trailing expr position as Expr::Macro (#1420)

2.0.5

• Expose ExprMacro data structure even when features="full" is not used (#1417)

2.0.4

• Improve error reporting when parsing identifiers and paths (#1415, #1416)

2.0.3

• Expose ExprGroup data structure even when features="full" is not used (#1412)

2.0.2

• Documentation improvements

2.0.1

• Add methods on syn::Meta for reporting error on an incorrect kind of attribute (#1409)

2.0.0

This release contains a batch of syntax tree improvements to incorporate ongoing Rust language development from the past 3.5 years since syn 1.

It never seems like an ideal time to finalize a syntax tree design, considering the frankly alarming number of syntax-disrupting language features currently in flight: keyword generics, restrictions, capabilities and contexts, conditional constness, new varieties of literals, dyn revamp such as explicitly dyn-safe traits and dyn-star, expression syntax in various phases of being added or being torn out (const blocks, try blocks, raw references), auto traits and negative impls, generalizations to higher rank trait bounds, async closures and static async trait methods, postfix keywords, pattern types, return type notation, unsafe attributes, …

... (truncated)

Commits

• 3da56a7 Release 2.0.15
• 2b7ba23 Merge pull request #1444 from Fancyflame/master
• 03e4f21 fix TypeTuple::to_tokens may result in TypeParen
• 0f78bdf Update test suite to nightly-2023-04-13
• 6536786 Ignore unnecessary_box_returns pedantic clippy lint
• 23686e4 Release 2.0.14
• ed15fda Merge pull request #1442 from programmerjake/add-pop-punct
• 81c5035 add Punctuated::pop_punct()
• 2dc7988 Update test suite to nightly-2023-04-05
• 1c1c2f0 Release syn-codegen 0.3.1
• Additional commits viewable in compare view

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[dependabot]

Superseded by #147.