Github markdown support for readme #349

	name: Doctest

	on:
	push:
	branches:
	- main
	pull_request:
	branches:
	- '**'

	jobs:

	build-and-test:
	name: doctest
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v1

	- name: Set up Python 3.12
	uses: actions/setup-python@v1
	with:
	python-version: 3.12
	architecture: x64

	- name: install seirmo
	run: \|
	python --version
	python -m pip install --upgrade pip setuptools wheel
	python -m pip install .
	python -m pip install .[docs]
	- name: run doctest
	run: \|
	python run-tests.py --doctest

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