fixup use of size_of in sqlx-postgres/src/types/cube.rs

Author: antialize

sqlx-postgres/src/types/cube.rs

@@ -6,6 +6,7 @@ use crate::{PgArgumentBuffer, PgHasArrayType, PgTypeInfo, PgValueFormat, PgValue
 use sqlx_core::bytes::Buf;
 use sqlx_core::Error;
 use std::str::FromStr;
+use std::mem;
 
 const BYTE_WIDTH: usize = 8;
 
@@ -304,7 +305,7 @@ fn remove_parentheses(s: &str) -> String {
 }
 
 impl Header {
-    const PACKED_WIDTH: usize = size_of::<u32>();
+    const PACKED_WIDTH: usize = mem::size_of::<u32>();
 
     fn encoded_size(&self) -> usize {
         Self::PACKED_WIDTH + self.data_size()