pybind11
pytest
pytest-cov
notebook
matplotlib
sphinx
sphinx-autobuild
numpydoc
tabulate
twine
wheel

pybind11>=2.2
pytest>=4.0
pytest-cov
notebook
matplotlib
sphinx>=1.4
sphinx-autobuild
numpydoc
tabulate
twine
wheel

Set some minimal versions in dev requirements
Set some minimal versions in dev requirements
