Update LITERATURE.md #144

	# This is a basic workflow to help you get started with Actions

	name: tests-sans-ppo
	# This is a basic workflow to help you get started with Actions

	on:
	push:
	branches: [ main ]
	pull_request:
	branches: [ main ]

	jobs:
	build:

	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version: [3.7, 3.8, 3.9]

	steps:
	- uses: actions/checkout@v2
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v2
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	python -m pip install wheel
	python -m pip install flake8 pytest
	if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
	python -m pip install scipy==1.7.3
	python -m pip uninstall pyportfolioopt -y
	- name: Lint with flake8
	run: \|
	# stop the build if there are Python syntax errors or undefined names
	flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
	# exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
	flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
	- name: Install test dependecies
	run: \|
	pip install -e .[test]
	- name: Test with pytest
	run: \|
	pytest

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