Changelog: - add support for old printers that don't have `counters` oid
0.1.21
Changelog: - allow to use of the external `snmp_engine`
0.1.20
Changelog: - change the data format of `uptime` sensor from the number of seconds since device startup to the datetime object **BREAKING CHANGE** - fix `uptime` sensor changes by a few seconds - fix tests
0.1.18
Changelog: - add `shutdown()` method
0.1.17
Changelog: - use `patch` from `unittest.mock`
0.1.16
Changelog: - use `mock.patch` instead `asynctest.patch` - add MANIFEST.in file