docs(#8): fazer um readme.md real #38

	name: "[Test] Run tests"
	on: [push]
	jobs:
	run-tests:
	runs-on: ubuntu-latest
	name: Run tests
	steps:
	- uses: actions/checkout@v2
	- name: Run tests
	run: cargo test
	env:
	MERCADO_PAGO_ACCESS: ${{ secrets.MERCADO_PAGO_ACCESS }}

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