Allow clippy warning use_self

src/lib.rs

@@ -27,6 +27,8 @@
     clippy::wrong_pub_self_convention,
     clippy::wrong_self_convention
 )]
+// Since we support Rust 1.34.2, we can't apply this suggestion yet
+#![allow(clippy::use_self)]
 
 pub mod r0;
 pub mod unversioned;