chore(deps): update syn requirement from 1.0.68 to 2.0.99

Updates the requirements on [syn](https://github.com/dtolnay/syn) to permit the latest version.
- [Release notes](https://github.com/dtolnay/syn/releases)
- [Commits](dtolnay/syn@1.0.68...2.0.99)

---
updated-dependencies:
- dependency-name: syn
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

crates/macros/Cargo.toml

@@ -12,7 +12,7 @@ edition = "2018"
 proc-macro = true
 
 [dependencies]
-syn = { version = "1.0.68", features = ["full", "extra-traits", "printing"] }
+syn = { version = "2.0.99", features = ["full", "extra-traits", "printing"] }
 darling = "0.14"
 ident_case = "1.0.1"
 quote = "1.0.9"