#!/bin/bash

curl -Ss 'https://github.com/OfflineIMAP/offlineimap/tags' \
| tr '"<>' '\n' \
| sed '
  s,^/OfflineIMAP/offlineimap/releases/tag/v\([0-9.]\+\)$,\1,
  t
  d
' \
| sort -V \
| tail -n1