Bump syn from 0.15.40 to 1.0.27

[dependabot-preview]

Bumps syn from 0.15.40 to 1.0.27.

Release notes

Sourced from syn's releases.

1.0.27

• Parse function calls in which the callee is an interpolated macro variable $fn(...) (#833)

1.0.26

• Parse paths containing an interpolated first component, such as $first::rest (rust-lang/rust#72608, #832)

1.0.25

• Parse opt-out ?const trait bounds (#767)
• Parse const generics in method generic arguments (#816, thanks @yodaldevoid)
• Parse trait bounds on type alias items (#821)
• Parse const generics on impl blocks (#822)
• Fix precedence of attributes on binary expressions to match rustc (#823)
• Remove parsing of extern:: paths which were removed from nightly in January 2019 (#825, rust-lang/rust#57572)
• Add Punctuated::clear, analogous to Vec::clear (#828)

1.0.24

• Parse mut self receiver in function pointer type (#812, #814)
• Parse const trait impls (#813)
• Improve error reporting inside struct expressions and struct patterns (#818)

1.0.23

• Parse inner attributes in traits (#803)
• Parse const underscore in traits and impls (#804)
• Implement Extend for Error (#805)
• Parse Or patterns (#806)
• Parse outer attributes on Expr* structs (#807)
• Parse top level const/static without value (#808)
• Parse syntactically accepted functions (#809)
• Parse extern static with value (#810)

Thanks @taiki-e for all of these.

1.0.22

• Parse literal suffix on byte string, byte, and char literal tokens: br#"..."#suffix, b'?'suffix, '?'suffix (#799, #800)

1.0.21

• Documentation improvements

1.0.20

• Improve span of error message when an error during syn::Macro::parse_body is triggered past the last token of the macro body (#791)

1.0.19

• Parse a more lenient extern type syntax inside extern blocks (#763)

1.0.18

• Ignore unparsed empty None-delimited groups at the end of a macro input (#783)

1.0.17

• Expose syn::Lit in default-features = false mode

... (truncated)

Commits

• fb24234 Release 1.0.27
• e1139e3 Wrap long token streams in tests
• 680ebee Make TokenStream explicit in snapshot tests
• 8496c33 Merge pull request #834 from dtolnay/group
• b247d62 Remove fixed fixme
• aa6052b Update Group attrs snapshot
• be29b25 Respect precedence around Group when parsing attrs
• 81394dd Add test for attributes surrounding group expr
• c144538 Add snapshot test for group with trailer expr
• 7caca26 Parse trailer exprs where the lhs is a Group
• Additional commits viewable in compare view

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[dependabot-preview]

Superseded by #588.