[REF] travis_install_nightly: Set default wkhtmltopdf to 0.12.5 (#299)
[REF] travis_install_nightly: Set default wkhtmltopdf to 0.12.5 (#299)

On 722a76b747e it was added support for wkhtmltopdf 0.12.5, so it should
be the default version now. If any project requires that older version,
it need to set it up manualli via the environment variable
$WKHTMLTOPDF_VERSION.
Vauxoo/maintainer-quality-tools,Vauxoo/maintainer-quality-tools,Vauxoo/maintainer-quality-tools