Bump syn from 1.0.58 to 1.0.64

[dependabot]

Bumps syn from 1.0.58 to 1.0.64.

Release notes

Sourced from syn's releases.

1.0.64

• Avoid clippy::expl_impl_clone_on_copy pedantic lint in downstream custom token types (#976)

1.0.63

• Fix parsing associated types with empty trait bound list after colon (#974)

1.0.62

• Republish to work around docs.rs bug rust-lang/docs.rs#1300

1.0.61

• Improve assertion failures on invalid use of Punctuated API (#970, thanks @​osa1)
• Add Lifetime::span and Lifetime::set_span accessors (#971)

1.0.60

• Provide an idiom for testing exhaustiveness of pattern matches on Expr, Type, Pat, Item, ForeignItem, TraitItem, and ImplItem (#694)

  match expr {
      Expr::Array(e) => {...}
      Expr::Assign(e) => {...}
      ...
      Expr::Yield(e) => {...}
  #[cfg(test)]
  Expr::__TestExhaustive(_) => unimplemented!(),
  #[cfg(not(test))]
  _ => { /* some sane fallback */ }
  
  }

  The above is the only supported idiom for exhaustive matching of those enum. Do not write anything differently as it is not supported.

  The conditional compilation on match-arms lets us fail your tests but not break your library when adding a variant. You will be notified by a test failure when a variant is added, so that you can add code to handle it, but your library will continue to compile and work for downstream users in the interim.

1.0.59

• Parse empty supertrait lists consistently with rustc (#952)
• Fix loss of span information on comma tokens inside of Type::Tuple during parse (#959)

Commits

• f0bc2d2 Release 1.0.64
• c2abcc0 Merge pull request #977 from dtolnay/explclone
• be5653c Suppress expl_impl_clone_on_copy pedantic lint in custom tokens
• 92b1129 Release 1.0.63
• 8ca66e5 Merge pull request #975 from dtolnay/emptybounds
• 79e357c Permit empty trait bounds after colon on type item
• e39fca3 Add regression test for issue 974
• 78f78ab Remove doc cfg attribute on impl on private type
• 5532e28 Release 1.0.62
• d131635 Release 1.0.61
• Additional commits viewable in compare view

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting @dependabot rebase.

---

Dependabot commands and options

You can trigger Dependabot actions by commenting on this PR:

• @dependabot rebase will rebase this PR
• @dependabot recreate will recreate this PR, overwriting any edits that have been made to it
• @dependabot merge will merge this PR after your CI passes on it
• @dependabot squash and merge will squash and merge this PR after your CI passes on it
• @dependabot cancel merge will cancel a previously requested merge and block automerging
• @dependabot reopen will reopen this PR if it is closed
• @dependabot close will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually
• @dependabot ignore this major version will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this minor version will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this dependency will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)

[codecov-io]

Codecov Report

Merging #130 (fc53074) into master (3d57b29) will decrease coverage by 0.71%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #130      +/-   ##
==========================================
- Coverage   15.77%   15.05%   -0.72%     
==========================================
  Files           5        5              
  Lines         279      279              
  Branches      156      134      -22     
==========================================
- Hits           44       42       -2     
- Misses        194      198       +4     
+ Partials       41       39       -2     

Impacted Files	Coverage Δ
src/specifier.rs	46.51% <0.00%> (-2.33%)	⬇️
src/pdf.rs	0.00% <0.00%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 3d57b29...fc53074. Read the comment docs.