Add multiple 'to' states

[vorostamas]

Example of having multiple states in "to":

automation:
  - alias: Turn on busylight if user is in a meeting
    trigger:
      platform: state
      entity_id: sensor.teams_activity # User status in Microsoft Teams 
      to: ["InACall", "InAMeeting"]
    action:
      - service: light.turn_on
        data:
          entity_id: light.bedroom_light

[frenck]

Accepting boolean is actually incorrect here.

Suggested change

	to?: string | string[] | boolean;
	to?: string | string[];

The HA state engine only works with strings.
See: https://github.com/home-assistant/core/blob/4acc6f333efe1d2426fb74510ce2de95971205b0/homeassistant/components/automation/state.py#L35

vol.Optional(CONF_TO): vol.Any(str, [str])

[frenck]

The same applies to the from case.

[frenck]

I've also added it to #374
Not because I wanted to bypass you, but the structure is changing in that PR, which would made this PR a merge conflict.

[frenck]

Replaced by #374