glib-macros: Update to proc-macro-crate 2

Author: sdroege

glib-macros/Cargo.toml

@@ -17,7 +17,7 @@ proc-macro-error = "1.0"
 proc-macro2 = "1.0"
 quote = "1.0"
 syn = { version = "2.0", features = ["full"] }
-proc-macro-crate = "1.0"
+proc-macro-crate = "2.0"
 
 [lib]
 proc-macro = true