Relax syn version requirements to ~2.0

Author: syl20bnr

Cargo.toml

@@ -30,7 +30,7 @@ rstest = "0.21.0"
 serde = { version = "1.0.200", features = ["derive"] }
 serde_json = "1.0.116"
 strum = {version = "0.26.3", features = ["derive"]}
-syn = {version = "2.0.72" , features = ["full"]}
+syn = {version = "~2.0" , features = ["full"]}
 tracing = { version = "0.1.40", features = ["log"] }
 tracing-subscriber = { version = "0.3.18", features = ["env-filter", "registry"] }