encoding/json would refuse to implicitly cast the numbers into strings.
Currently we don't use these values, so let's preserve their type using
`any` for now.
An example is `keep_time` for occupancy sensors, where it's
[30, 60, 120] seconds.
Devices that have not received an update since a fixed timeout (24 hrs
for now), based on its last_seen time, will be marked as "not
responding" in the Home app. With this I can identify which devices are
unreachable or dead.
Also needed to upgrade hap with the fix for brutella/hap#30, or the
entire bridge will stop working.
