Bump syn from 1.0.109 to 2.0.104

[dependabot]

Bumps syn from 1.0.109 to 2.0.104.

Release notes

Sourced from syn's releases.

2.0.104

• Disallow attributes on range expression (#1872)

2.0.103

• Insert parentheses around binary operation with attribute (#1871)

2.0.102

• Fix printing of nested Expr::Index and Expr::Tuple in non-full mode (#1869)

2.0.101

• Improve TypeGenerics::as_turbofish to return longer-lived return value (#1861)

2.0.100

• Add Visit::visit_token_stream, VisitMut::visit_token_stream_mut, Fold::fold_token_stream for processing TokenStream during syntax tree traversals (#1852)

2.0.99

• Documentation improvements

2.0.98

• Allow lifetimes in function pointer return values in ParseStream::call and Punctuated parsers (#1847)

2.0.97

• Documentation improvements

2.0.96

• Expression precedence fixes (#1834, #1836, #1837, #1838, #1839, #1840)

2.0.95

• Fix parenthesization of struct literals in let-chains (#1832)

2.0.94

• Expression precedence fixes (#1811, #1812, #1813, #1814, #1815, #1816, #1818, #1819, #1820, #1825, #1826, #1827, #1828, #1829, #1830)

2.0.93

• Fix expression parsing edge cases: x as T <<= y (#1804), break as T (#1805), match x { _ if .. => {} } (#1807)
• Fix expression printing edge cases: || -> T 'a: {} (#1806), if break x {} (#1808, #1810)

2.0.92

• Fix parenthesization of jumps inside ranges (#1798)

2.0.91

• Support parsing Vec<Arm> using parse_quote! (#1796, #1797)

2.0.90

• Fix automatic parenthesization of subexpressions containing outer attributes, such as (#[attr] thing).field (#1785)
• Fix automatic parenthesization of function calls via a struct field, such as (thing.field)() and thing.0() (#1786)

2.0.89

• Fix "compiler/fallback mismatch 949" panic (dtolnay/proc-macro2#483)

... (truncated)

Commits

• 2283a98 Release 2.0.104
• d745687 Merge pull request #1872 from dtolnay/attrrange
• 350a4ab Disallow attributes on range expression
• da96f95 Add test of attributes on range
• 7a79818 Update test suite to nightly-2025-06-19
• 85d4276 Release 2.0.103
• 6f7b0f3 Merge pull request #1871 from dtolnay/binaryattr
• 89f88fa Correctly track bailouts in parenthesized binary expressions
• 0e07372 Add binary operator attribute bailout test
• ca8d876 Insert parentheses around binary operation with attribute
• Additional commits viewable in compare view

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[jstuczyn]

@dependabot rebase

[jstuczyn]

superseded by #5998

[dependabot]

OK, I won't notify you again about this release, but will get in touch when a new version is available. If you'd rather skip all updates until the next major or minor version, let me know by commenting @dependabot ignore this major version or @dependabot ignore this minor version. You can also ignore all major, minor, or patch releases for a dependency by adding an ignore condition with the desired update_types to your config file.

If you change your mind, just re-open this PR and I'll resolve any conflicts on it.