• Fix broken dependency in python imports
• Make alert2 robust to errors in the config. So an error in a single alert specification will result in a "config_error" alert rather than preventing alert2 from initializing.
• Add support for value-based hysteresis
• Add support for specifying condition alerts that can fire before HA has fully started ("early_start")
• Add binary_sensor.alert2_ha_startup_done to indicate when HA has fully started and HOMEASSISTANT_STARTED has fired. This binary_sensor also has an attribute, "start_time", that marks the alert2 module load time.
• Sync version number with that in manifest.json