Log Message:
hangups: Update chat/py-hangups to 0.4.4

pkgsrc changes:
 - Update some DEPENDS PKGVERSIONs to reflect upstream setup.py changes

Changes:
 * fix error when updating read timestamp for empty conversation
 * fix HTTP client resource management issue
 * add alternate up/down keybindings
 * add terminal bell notification method
 * add --notification-type option, deprecate --disable-notifications
 * fix exception propagation issues in UI