unpin dependencies

pacdef_macro/Cargo.toml

@@ -6,9 +6,9 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-proc-macro2 = "1.0.49"
-quote = "1.0.23"
-syn = "1.0.107"
+proc-macro2 = "*"
+quote = "*"
+syn = "*"
 
 [lib]
 proc-macro = true