Restrict poetry-core version to <2.0.0 in pyproject.toml

[eranhd]

Poetry release a new version (2,0.0 on Jan 5) which break the install from branch with the following error,
in this PR I pin the poetry-core version to be < 2

Traceback (most recent call last):
File "/ts/venv/lib/python3.9/site-packages/pip/_vendor/pep517/in_process/_in_process.py", line 363, in
main()
File "/ts/venv/lib/python3.9/site-packages/pip/_vendor/pep517/in_process/_in_process.py", line 345, in main
json_out['return_val'] = hook(**hook_input['kwargs'])
File "/ts/venv/lib/python3.9/site-packages/pip/_vendor/pep517/in_process/_in_process.py", line 164, in prepare_metadata_for_build_wheel
return hook(metadata_directory, config_settings)
File "/tmp/pip-build-env-fc5khjv7/overlay/lib/python3.9/site-packages/poetry/core/masonry/api.py", line 43, in prepare_metadata_for_build_wheel
builder = WheelBuilder(poetry)
File "/tmp/pip-build-env-fc5khjv7/overlay/lib/python3.9/site-packages/poetry/core/masonry/builders/wheel.py", line 65, in init
super().init(poetry, executable=executable)
File "/tmp/pip-build-env-fc5khjv7/overlay/lib/python3.9/site-packages/poetry/core/masonry/builders/builder.py", line 43, in init
self._meta = Metadata.from_package(self._package)
File "/tmp/pip-build-env-fc5khjv7/overlay/lib/python3.9/site-packages/poetry/core/masonry/metadata.py", line 112, in from_package
if name == "repository" and url == package.urls["Repository"]:
KeyError: 'Repository'
error: subprocess-exited-with-error