chore: move serde impls to module (bytesize-rs#62)

Author: robjtede

src/lib.rs

@@ -465,14 +465,4 @@ mod tests {
     fn test_to_string() {
         assert_to_string("609.0 PB", ByteSize::pb(609), true);
     }
-
-    #[test]
-    #[cfg(feature = "serde")]
-    fn test_serde_json() {
-        let json = serde_json::to_string(&ByteSize::mib(1)).unwrap();
-        assert_eq!(json, "\"1.0 MiB\"");
-
-        let deserialized: ByteSize = serde_json::from_str(&json).unwrap();
-        assert_eq!(deserialized.0, 1048576);
-    }
 }