imaplib2: Bump from 2.20 to 2.22
imaplib2: Bump from 2.20 to 2.22

This contains a fixed Time2InternalDate function and a more robust
socket connection, trying twice and raising an error only when that
fails (I believe). The actual code changes are rather minor.

Signed-off-by: Sebastian Spaeth <98dcb2717ddae152d5b359c6ea97e4fe34a29d4c@SSpaeth.de>
Reviewed-by: Ethan Glasser-Camp <0a27e12d062ad71673d57f9c2799b207af316885@betacantrips.com>
Signed-off-by: Nicolas Sebrecht <347709267ddd1958560c4c317ea3fd613f10a719@laposte.net>

frioux/offlineimap,frioux/offlineimap