Local index updates for all package managers #8
Description
Currently, some __package_* types update the local package index/cache when required, others don't:
__package_apk: not implemented (--cache-max-age)__package_apt: implemented (in type and separate__apt_update_index)__package_dpkg: not required__package_emerge: not implemented__package_emerge_dependencies:__package_luarocks: ?__package_opkg: not implemented__package_pacman: not implemented (-y)__package_pip: not required?__package_pkg_freebsd: not required?__package_pkgng_freebsd: not implemented__package_pkg_openbsd: not required?__package_rubygem: not required?__package_yum: not required?__package_zypper: ?
Index updates should be implemented for all package managers that require manual updates in a similar fashion (either inside each type or as a separate type).