v1.8.1

• furbo.get_events no longer drops the event-name filter when every alert
  is switched off. The default is built from the alerts your cameras have
  enabled, and with none enabled that list came out empty, which put the field
  back to absent and quietly restored the behaviour 1.8.0 exists to avoid.
  Turning alerts off stops new events being recorded; it does not remove the
  ones already there, and asking for a window in the past is a fair thing to do
  with them all off. The request now falls back to everything those cameras can
  report, and to the full vocabulary if their alerts are not known yet.
• The two cat alert-frequency controls have names, options and icons. 1.8.0
  gave Meowing and CatActivity a notification-frequency select each and no
  translations, so they appeared as frequency_cat_activity with raw option
  values. The test that was supposed to catch this only checked the alert
  existed, not that the control it implies was ever described; it now checks
  both, and fails when either is missing.