Specify syn and genco-macros version for rust vm

wojciechos · omerfirmak · commit 3484b213da68 · 2023-11-06T20:59:24.000+03:00
diff --git a/vm/rust/Cargo.toml b/vm/rust/Cargo.toml
@@ -17,6 +17,7 @@ indexmap = "1.9.2"
 starknet = { rev = "starknet-core/v0.4.0", git = "https://github.com/xJonathanLEI/starknet-rs" }
 cached = "0.44.0"
 once_cell = "1.18.0"
+syn = "=2.0.38"
 
 [lib]
 crate-type = ["staticlib"]
