Upgrade libmaxminddb to 1.12.2#181

horgh merged 1 commit intomainmaxmind/MaxMind-DB-Reader-python:mainfrom

greg/eng-1020-libmaxminddb-1122-is-releasedmaxmind/MaxMind-DB-Reader-python:greg/eng-1020-libmaxminddb-1122-is-releasedCopy head branch name to clipboard