Hass.io 0.71

• Allow to set option as optional inside schema with a ? on the end of type: str?
• Remove deepmerge and use python3.6 merge to protect merge into wrong storage
• Allow simple lists inside dicts:

{
  "step1": {
    "step_list": ["str"]
  },
  "step_deep": [
    {
      "step_deep_list": ["str"]
    }
  ]
}