[Libguestfs] latest libguestfs repo for CentOS 6.4

Hello Experts, I am using CentOS 6.4. I have libguestfs 1.16 installed on my system (CentOS 6.4). I want to use iscsi and for that I want to install libguestfs

= 1.21. Is libguestfs 1.21 is available for CentOS 6.4?

Many Thanks in advance.