fixing get_offer for unknown mechanisms #600

	name: PyPI

	on: push
	jobs:
	build-n-publish:
	name: Build and publish Python 🐍 distributions 📦 to PyPI and TestPyPI
	runs-on: "ubuntu-latest"

	steps:
	- uses: actions/checkout@master
	- uses: actions/setup-python@v2
	with:
	python-version: '3.11'
	- uses: actions/setup-java@v2
	with:
	distribution: 'zulu' # See 'Supported distributions' for available options
	java-version: '15'
	- name: "Install pep517 and twine"
	run: "python -m pip install --upgrade pip setuptools wheel pytest twine"
	- name: "Build package"
	run: "python setup.py sdist bdist_wheel"
	- name: "Check long_description"
	run: "python -m twine check dist/*"
	- name: Publish distribution 📦 to Test PyPI
	if: github.event_name == 'push' && startsWith(github.event.ref, 'refs/tags')
	uses: pypa/gh-action-pypi-publish@master
	with:
	user: __token__
	password: ${{ secrets.pypitesttoken }}
	repository_url: https://test.pypi.org/legacy/
	- name: "Run all tests"
	run: \|
	set -xe
	ulimit -n 50000
	python -VV
	python -m site
	python -m pip install --upgrade pip setuptools wheel pytest
	python -m pip install --upgrade virtualenv
	python -m pip install -r requirements.txt
	python -m pip install -r requirements-dev.txt
	python -m ipykernel install --user --name=negmas
	python -m pip install -e .
	export NEGMAS_IGNORE_TEST_NOTEBOOKS=False; python -W ignore -m pytest negmas tests
	- name: Publish distribution 📦 to PyPI
	if: github.event_name == 'push' && startsWith(github.event.ref, 'refs/tags')
	uses: pypa/gh-action-pypi-publish@master
	with:
	user: __token__
	password: ${{ secrets.pypiapitoken }}

Provide feedback