Use pickle protocol compatible with Python 3.6 #731

	name: CI
	on: [push, pull_request]

	env:
	CXXFLAGS: "-fprofile-arcs -ftest-coverage"

	jobs:
	test:
	name: "Python ${{ matrix.python-version }} / ${{ matrix.os }}"
	runs-on: ${{ matrix.os }}
	strategy:
	matrix:
	python-version: ["3.10"]
	os: [ubuntu-22.04]
	compiler: [gcc]
	env:
	CC: ${{ matrix.compiler }}
	steps:
	- uses: actions/checkout@v3
	- name: Install dependencies
	run: \|
	sudo apt-get update -qq
	sudo apt-get install -qq libboost-all-dev swig libhdf5-dev libeigen3-dev \
	cmake libcgal-dev libcgal-qt5-dev libcereal-dev \
	libfftw3-dev libopencv-dev libgsl-dev libann-dev \
	libprotobuf-dev protobuf-compiler \
	libopenmpi-dev python3-dev python3-numpy python3-protobuf \
	python3-nose python3-pip python3-biopython
	pip3 install codecov
	- name: Set up git
	run: ./setup_git.py
	- name: Build IMP
	run: \|
	mkdir build
	cd build
	cmake .. -DUSE_PYTHON2=OFF -DCMAKE_CXX_FLAGS="${{ env.CXXFLAGS }}" -DCGAL_DIR=/usr/lib/x86_64-linux-gnu/cmake/CGAL/
	make -k -j 2

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