[light.tradfri] async support with resource observation. (#7815)

* [light.tradfri] Initial support for observe

* Update for pytradfri 2.0

* Fix imports

* Fix missing call

* Don't yield from add devices

* Fix imports

* Minor fixes to async code.

* Imports, formatting

* Docker updates, some minor async code changes.

* Lint

* Lint

* Update pytradfri

* Minor updates for release version

* Build fixes

* Retry observation if failed

* Revert

* Additional logging, fix returns

* Fix rename

* Bump version

* Bump version

* Support transitions

* Lint

* Fix transitions

* Update Dockerfile

* Set temp first

* Observation error handling

* Lint

* Lint

* Lint

* Merge upstream changes

* Fix bugs

* Fix bugs

* Fix bugs

* Lint

* Add sensor

* Add sensor

* Move sensor attrs

* Filter devices better

* Lint

* Address comments

* Pin aiocoap

* Fix bug if no devices

* Requirements

virtualization/Docker/scripts/aiocoap

@@ -0,0 +1,23 @@
+#!/bin/sh
+# Installs a modified coap client with support for dtls for use with IKEA Tradfri
+
+# Stop on errors
+set -e
+
+python3 -m pip install cython
+
+cd /usr/src/app/
+mkdir -p build && cd build
+
+git clone --depth 1 https://git.fslab.de/jkonra2m/tinydtls
+cd tinydtls
+autoreconf
+./configure --with-ecc --without-debug
+cd cython
+python3 setup.py install
+
+cd ../..
+git clone --depth 1 https://github.com/chrysn/aiocoap/
+cd aiocoap
+git reset --hard 0df6a1e44582de99ae944b6a7536d08e2a612e8f
+python3 -m pip install .