chore(deps): bump syn from 1.0.109 to 2.0.10

[dependabot]

Bumps syn from 1.0.109 to 2.0.10.

Release notes

Sourced from syn's releases.

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, …

The plan continues to be the same as laid out originally in the 1.0.0 release announcement:

Be aware that the underlying Rust language will continue to evolve. Syn is able to accommodate most kinds of Rust grammar changes via the nonexhaustive enums and Verbatim variants in the syntax tree, but we will plan to put out new major versions on a 12 to 24 month cadence to incorporate ongoing language changes as needed.

If anything, the takeaway from the 3.5 year longevity of syn 1 is that this period was tamer from a language development perspective than anticipated, but that is unlikely to last and I think around 24 months is still the correct cadence to expect between releases going forward.

Breaking changes

• Minimum required Rust version is raised from rustc 1.31 to 1.56.

... (truncated)

Commits

• c4976f1 Release 2.0.10
• 1f705d8 Remove precedence logic for the removed type ascription expression
• 64ed2b1 Disallow visibility and defaultness on macro call in trait item position
• a33ffa3 Fix parsing of const, async, unsafe, and extern fns inside impl block
• 94439aa Restore lookahead peek for better error message
• 275d368 Release 2.0.9
• 280d5e4 Remove dead code from ImplItemFn's ToTokens
• 5036fd9 Clean up ImplItemFn hack using ImplItem::Verbatim
• 0f99d27 Factor out some common code for type parsing
• fd8d37e Disallow some nonsensical configurations of items
• Additional commits viewable in compare view

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[dependabot]

Superseded by #17096.