Bump syn from 1.0.82 to 1.0.86
Bumps [syn](https://github.com/dtolnay/syn) from 1.0.82 to 1.0.86.
- [Release notes](https://github.com/dtolnay/syn/releases)
- [Commits](https://github.com/dtolnay/syn/compare/1.0.82...1.0.86)
---
updated-dependencies:
- dependency-name: syn
dependency-type: indirect
update-type: version-update:semver-patch
...
Signed-off-by: dependabot[bot] <support@github.com>