Update after deprecation of device_state_attributes.

Please see this change: https://github.com/home-assistant/developers.home-assistant/pull/837/files

'device_state_attributes' has  been renamed to 'extra_state_attributes'.

It was still working, but this was adding warnings to my log that I'm happy to address

Testing:

I installed the updated component, noticed all untappd sensors worked as expected, and noticed the warning no longer appears in my HA logs

Merge pull request #36 from frauhottelmann/master

Change Icon to supported one

Update manifest.json

Merge pull request #21 from pinkywafer/create-resources.json

Create resources.json

clean up attribution and bump version

Merge pull request #17 from kvanhoorn/master

added brewery as attribute to latest checkin

🍺 rename to embedded platform

Update README.md

Update README.md