fix: allow unnecessary_transmutes for ffi binding (#140)

Author: ldm0

src/lib.rs

@@ -5,6 +5,7 @@ mod avutil;
     non_camel_case_types,
     non_upper_case_globals,
     improper_ctypes,
+    unnecessary_transmutes,
     clippy::all
 )]
 pub mod ffi {