Update README.md #53

	name: PlatformIO CI

	on: [push]

	jobs:
	build:

	runs-on: ubuntu-latest
	strategy:
	matrix:
	example: [examples/Single_Shot/Single_Shot.ino, examples/Continuous/Continuous.ino, examples/Alert_Window_Mode/Alert_Window_Mode.ino]

	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 setuptools
	pip install --upgrade platformio
	- name: Run PlatformIO
	run: pio ci --lib="." --board=uno --board=esp-wrover-kit --board=d1_mini
	env:
	PLATFORMIO_CI_SRC: ${{ matrix.example }}

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