Bump syn from 0.15.40 to 1.0.9

[dependabot-preview]

Bumps syn from 0.15.40 to 1.0.9.

Release notes

Sourced from syn's releases.

1.0.9

• Fix failure to parse tuple struct fields of tuple type starting with crate (#720, #723, thanks @​mystor)
• Fix unexpected tokens being ignored when using Speculative::advance_to (#721, #723, thanks @​mystor)

1.0.8

• Require trailing comma when parsing TypeTuple with one element (#716, thanks @​8BitMate)

1.0.7

• Add a receiver getter to syn::Signature (#714, thanks @​mystor)

  impl Signature {
      /// A method's `self` receiver, such as `&self` or `self: Box<Self>`.
      pub fn receiver(&self) -> Option<&FnArg>;
  }

1.0.6

• Add conversions from Item{Struct,Enum,Union} into DeriveInput (#711, thanks @​mystor)
• Add Fields::len and Fields::is_empty (#712, thanks @​mjbshaw)

1.0.5

• Expose syn::Variadic with just "derive" feature, not "full", because it appears in Type::BareFn

1.0.4

• Fix size_hint of Punctuated iterators (#700, thanks @​ExpHP)

1.0.3

• Add Path::get_ident (#696, thanks @​infinity0)

1.0.2

• Documentation improvements

1.0.1

• Add LitInt::base10_parse to produce error that has the right span when parsing literal digits

1.0.0

Syn is a library for parsing Rust code, largely geared toward use in procedural macros but generally applicable as a Rust parser outside of that too.

Syn was originally a sidequest on the effort to making Serde's derive macros work on stable Rust in 2016, but has since taken off as a foundational library in its own right. These days it appears in support of diverse use cases like:

• convenient interop between Rust-based Wasm modules and JavaScript,
• easy command line interfaces,
• a polished async experience, and
• [a concurrency framework for embedded real time systems][rtfm].

... (truncated)

Commits

• 6741d4e Release 1.0.9
• ca2c5ad Touch up ParseBuffer::unexpected changes
• 6bf971d Format with rustfmt 2019-10-07
• 66bae29 Merge pull request #723 from mystor/vis_parsing
• 112af68 Chain unexpected errors from forked streams after 'advance_to'
• 466fc9b Fix parse error when parsing pub(crate::path)
• e53f215 Add tests for Visibility parsing
• 7b2e271 Update test suite to nightly-2019-11-26
• 6cb2e91 Check http response for error code
• 258be85 Remove unneeded lifetime from static in test
• Additional commits viewable in compare view

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[dependabot-preview]

Superseded by #546.