Symfony 2 and PHP 5 are no longer supported, so make sure to upgrade your systems.
The addPackage
call is changed to also accept an options string for the package. To allow this change, the base templates have changed. There will be no problems when you did not overwrite the base article, book or letter templates.
The packages are now contained in an array, where previously the were simply a string.
array(
'p' => $package,
'o' => $options
);
You should adjust your custom templates accordingly:
{% for package in packages -%}
\usepackage[ {{- package.o -}} ]{ {{- package.p -}} }
{%- endfor %}