Update

src/main.rs

@@ -14,6 +14,7 @@ extern crate int_enum;
 extern crate lazy_static;
 #[cfg(all(feature = "link-cplusplus", target_env = "gnu"))]
 extern crate link_cplusplus;
+extern crate modular_bitfield;
 extern crate proc_macros;
 extern crate tokio;
 extern crate regex;