fix(deps): update rust crate syn to v2

Author: renovate[bot]

eventually-macros/Cargo.toml

@@ -20,6 +20,6 @@ keywords = ["architecture", "ddd", "event-sourcing", "cqrs", "es"]
 proc-macro = true
 
 [dependencies]
-syn = { version = "1.0.109", features = ["full"] }
+syn = { version = "2.0.0", features = ["full"] }
 quote = "1.0.35"
 eventually = { path = "../eventually" }