Need minimal syn 2.0.5 to pass tests

cuviper · cuviper · commit 4ff3da1cfa61 · 2023-06-29T19:11:10.000-07:00
diff --git a/Cargo.toml b/Cargo.toml
@@ -16,7 +16,7 @@ edition = "2018"
 [dependencies]
 proc-macro2 = "1"
 quote = "1"
-syn = "2"
+syn = "2.0.5"
 
 [dev-dependencies]
 num = "0.3"
