Nuki Hub 8.33

PRs by @iranl

• PR #293: Checks latest github release on boot and every 24 hours. Closes #189
• PR #299: Add ring as an event in Home Assistant
• PR #302: Hide the new GitHub buttons on the /ota WebCfg page after uploading a binary.
• PR #301: Add MQTT topics for JSON lock/opener and keypad. Closes #41
• PR #303: Disable UpdateAuthData when no PIN is set
• PR #206:
  Allow Home Assistant to show intermediate states (unlocking/locking/opening) and jammed state.
  Add a separate MQTT topic for continuous mode state, distinct from lock state
  Make Opener Continuous mode (instead of RTO) an option for the default Home Assistant lock/unlock action
  Add a binary sensor for continuous mode for Home Assistant discovery
  Add a separate switch for continuous mode for Home Assistant discovery (disabled by default)
  Closes #253, #163, #212, #67
• Prevent Home Assistant warnings on Ring Event
• Show continuous mode state in WebCfg (Closes #304)

PR by @lucaoliano

• PR #289: Refactoring of network code