Bump syn from 1.0.69 to 1.0.74

[dependabot-preview]

Bumps syn from 1.0.69 to 1.0.74.

Release notes

Sourced from syn's releases.

1.0.74

• Reject for<'a> dyn Trait<'a> syntax; the correct representation is dyn for<'a> Trait<'a> (#1042)

1.0.73

• Add From<Ident>, From<Index>, From<usize> for Member (#1038, thanks @​m-ou-se)

1.0.72

• Parse const generics which use value of a previous const generic parameter as a default value (#1027)

1.0.71

• Fix panic deserializing an ItemImpl with a non-path in trait position (#1023)
• Parse visibility on impl blocks (#1024)
• Fix parsing a type parameter default on the first generic parameter of an impl block (#1025, thanks @​taiki-e)

1.0.70

• Fix precedence of closure body vs ExprRange rhs: || .. .method() (#1019)
• Parse inner attributes inside of structs and enums (#1022)

Commits

• 9e206da Release 1.0.74
• efa4d7f Merge pull request #1042 from dtolnay/fordyn
• f73fed9 Reject for<'a> dyn Trait
• 436eb22 Update test suite to nightly-2021-07-09
• 1296bac Resolve clippy append_instead_of_extend lint
• ffbb00f Update test suite to nightly-2021-06-11
• 82ac4e6 Release 1.0.73
• e0ca403 Merge pull request #1038 from m-ou-se/member-from
• 8ed86e9 Add From<{Ident, Index, usize}> for Member.
• 5a9efb0 Resolve needless_borrow clippy lint
• Additional commits viewable in compare view

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