Add MIT license header to uzlib wrapper and specify min platform version #50

	# This workflow builds all platformio build targets to test whether any of them were broken by a commit.

	name: Platform IO build

	on:
	push:
	paths:
	- src/**
	- lib/**
	- test/**
	- include/**
	- platformio.ini
	- .github/workflows/pio.yml
	pull_request:
	branches: [ master ]

	jobs:
	build:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout Repo
	uses: actions/checkout@v3

	- name: Setup Python
	uses: actions/setup-python@v4
	with:
	python-version: 3.x

	- name: Cache pip packages and Platform IO build cache
	uses: actions/cache@v3
	with:
	path: \|
	~/.cache/pip
	~/.platformio
	.pio
	key: platformio-${{ hashFiles('platformio.ini') }}

	- name: Install Platform IO
	run: pip install -U platformio

	- name: Create crdential files
	run: \|
	echo "OTA Password" > otapass.txt
	echo "WiFi SSID" > wifissid.txt
	echo "WiFi Passphrase" > wifipass.txt
	echo "MQTT Username" > mqttuser.txt
	echo "MQTT Password" > mqttpass.txt

	- name: Run Platform IO builds
	run: pio run

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