Description:

This PR makes the following changes to AirVisual:

• Bumps the underlying library (pyairvisual) to 1.0.0.
• Makes the platform async.
• Removes the radius configuration parameter (no longer used in the AirVisual API).
• Fixes a bug with colliding unique IDs between U.S. and Chinese sensors.
• Adds in support for scan_interval.
• Rearchitects the platform the be more consistent in style with other sensor platforms.

BREAKING CHANGES

First, the radius configuration parameter no longer does anything and has been removed. This won't negatively impact any existing integrations, but it should still be noted.

Second, this PR will modify the unique IDs for each sensor to correctly include the locale. New unique IDs will now include _us_ and _cn_ – example:

sensor.us_air_quality_index:
  config_entry_id:
  name:
  platform: airvisual
  unique_id: Los Angeles,California,USA_us_air_quality_index
sensor.chinese_main_pollutant:
  config_entry_id:
  name:
  platform: airvisual
  unique_id: Los Angeles,California,USA_cn_main_pollutant
sensor.us_air_pollution_level:
  config_entry_id:
  name:
  platform: airvisual
  unique_id: Los Angeles,California,USA_us_air_pollution_level
sensor.chinese_air_pollution_level:
  config_entry_id:
  name:
  platform: airvisual
  unique_id: Los Angeles,California,USA_cn_air_pollution_level
sensor.chinese_air_quality_index:
  config_entry_id:
  name:
  platform: airvisual
  unique_id: Los Angeles,California,USA_cn_air_quality_index
sensor.us_main_pollutant:
  config_entry_id:
  name:
  platform: airvisual
  unique_id: Los Angeles,California,USA_us_main_pollutant

Related issue (if applicable): N/A

Pull request in home-assistant.github.io with documentation (if applicable): home-assistant/home-assistant.io#5534

Example entry for configuration.yaml (if applicable):

sensor:
  - platform: airvisual
    api_key: API_KEY
    show_on_map: false
    city: Los Angeles
    state: California
    country: USA

Checklist:

• The code change is tested and works locally.
• Local tests pass with tox. Your PR cannot be merged unless tests pass

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated in home-assistant.github.io

If the code communicates with devices, web services, or third-party tools:

• New dependencies have been added to the REQUIREMENTS variable (example).
• New dependencies are only imported inside functions that use them (example).
• New or updated dependencies have been added to requirements_all.txt by running script/gen_requirements_all.py.
• New files were added to .coveragerc.