Update python-awair to 0.2.1 (#43415)

This version of python awair has support for the local api - which is
cool! But more importantly, this version also is less strict about the
versions of aiohttp it depends on.

This version prepares for the upcoming pip resolver changes outlined here:
https://pyfound.blogspot.com/2020/03/new-pip-resolver-to-roll-out-this-year.html#what-will-change

cc https://github.com/ahayworth/python_awair/issues/18

homeassistant/components/awair/manifest.json

@@ -2,7 +2,7 @@
   "domain": "awair",
   "name": "Awair",
   "documentation": "https://www.home-assistant.io/integrations/awair",
-  "requirements": ["python_awair==0.1.1"],
+  "requirements": ["python_awair==0.2.1"],
   "codeowners": ["@ahayworth", "@danielsjf"],
   "config_flow": true
 }

requirements_all.txt

@@ -1830,7 +1830,7 @@ python-whois==0.7.3
 python-wink==1.10.5
 
 # homeassistant.components.awair
-python_awair==0.1.1
+python_awair==0.2.1
 
 # homeassistant.components.swiss_public_transport
 python_opendata_transport==0.2.1

requirements_test_all.txt

@@ -893,7 +893,7 @@ python-twitch-client==0.6.0
 python-velbus==2.1.1
 
 # homeassistant.components.awair
-python_awair==0.1.1
+python_awair==0.2.1
 
 # homeassistant.components.tile
 pytile==4.0.0