Find roundcube version provided by the cPanel and upgrade the roundcube

How to find roundcube version provided by the cPanel?

The roundcube version provided by the cPanel is 0.5.4.
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-bash-3.2# cat /var/cpanel/roundcube/version
0.5.4.cp11130.1-bash-3.2#
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cPanel dicument regarding the roundcube
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http://docs.cpanel.net/twiki/bin/view/AllDocumentation/RoundcubeReadme
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Upgrade rouncube version

/usr/local/cpanel/bin/update-roundcube --force
cd /usr/local/cpanel/base/3rdparty/
mv roundcube roundcube-backup
wget http://softlayer.dl.sourceforge.net/project/roundcubemail/roundcubemail/0.6/roundcubemail-0.6.tar.gz
tar -zxf roundcubemail-0.6.tar.gz
mv roundcubemail-0.6 roundcube
cp roundcube-backup/config/main.inc.php roundcube/config/
cp roundcube-backup/config/db.inc.php roundcube/config/
chown root:wheel -R roundcube
cd roundcube/config
chown cpanelroundcube:cpanelroundcube db.inc.php
chown cpanelroundcube:cpanelroundcube main.inc.php
echo > /var/cpanel/roundcube/install
chmod +x /var/cpanel/roundcube/install