Add README note about OWM deprecation #44

	# documentation at https://docs.platformio.org/en/latest/integration/ci/github-actions.html

	name: PlatformIO CI

	on: [push, pull_request]

	jobs:
	build:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	example:
	- examples/AerisForecastsDemo
	- examples/AerisObservationDemo
	- examples/AerisSunMoonDemo
	- examples/AstronomyDemo
	- examples/OpenWeatherMapCurrentDemo
	- examples/OpenWeatherMapForecastDemo
	# - examples/PlaneSpotterDemo doesn't work on ESP32 due to WiFi Manager dependency
	- examples/SunMoonCalcDemo
	- examples/WeatherStationDemo
	- examples/WorldClockDemo
	steps:
	- uses: actions/checkout@v2
	- name: Cache pip
	uses: actions/cache@v2
	with:
	path: ~/.cache/pip
	key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
	restore-keys: ${{ runner.os }}-pip-
	- name: Cache PlatformIO
	uses: actions/cache@v2
	with:
	path: ~/.platformio
	key: ${{ runner.os }}-${{ hashFiles('**/lockfiles') }}
	- name: Set up Python
	uses: actions/setup-python@v2
	- name: Install PlatformIO
	run: \|
	python -m pip install --upgrade pip
	pip install --upgrade platformio
	- name: Install library dependencies
	run: pio lib -g install "JsonStreamingParser" "thingpulse/ESP8266 and ESP32 OLED driver for SSD1306 displays@^4.2.0" "WifiManager@>=0.15.0-beta"
	- name: Run PlatformIO
	run: pio ci --lib="." --project-option="lib_deps=JsonStreamingParser" --board=nodemcuv2 --board=d1_mini --board=esp-wrover-kit
	env:
	PLATFORMIO_CI_SRC: ${{ matrix.example }}

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