Returns an array of update preferences for the current package. This method is used to ensure that users are not asked about updates they do not want to be asked about.
The array returned may have up to four elements:
if TRUE the user does not want to know about any new updates.
if set, the user does not want to be asked until a version greater than the value of this element has been released.
if set, the user does not want to be notified unless the release is at least the given type (one of PEAR_PACKAGEUPDATE_TYPE_BUG, PEAR_PACKAGEUPDATE_TYPE_MINOR, PEAR_PACKAGEUPDATE_TYPE_MAJOR).
if set, the user does not want to be notified unless the release has at least the given state (one of PEAR_PACKAGEUPDATE_PREF_STATE_DEVEL, PEAR_PACKAGEUPDATE_PREF_STATE_ALPHA, PEAR_PACKAGEUPDATE_PREF_STATE_BETA, PEAR_PACKAGEUPDATE_PREF_STATE_STABLE).