offlineimap.py: fix version number
offlineimap.py: fix version number

The release number information is hard coded. Here is a quick fix to update it
to the last release.

We may introduce more elaborated stuff to define the release dynamically.

Signed-off-by: Nicolas Sebrecht <347709267ddd1958560c4c317ea3fd613f10a719@laposte.net>

frioux/offlineimap,frioux/offlineimap