Document supporting ByteBuffer and ByteBuf as parameters in prepared statements

Author: mst-appear

mysql-async/README.md

@@ -89,6 +89,8 @@ java.sql.Timestamp | timestamp
 java.sql.Time | time
 String | string
 Array[Byte] | blob
+java.nio.ByteBuffer | blob
+io.netty.buffer.ByteBuf | blob
 
 You don't have to match exact values when sending parameters for your prepared statements, MySQL is usually smart
 enough to understand that if you have sent an Int to `smallint` column it has to truncate the 4 bytes into 2.