Update conda index command (#234)

* See also python-control/python-control#981

Merge pull request #195 from bnavigator/slicot-update

Update SLICOT to 5.8 Update 1

Merge pull request #189 from bnavigator/fix-f2py-mod

remove -m argument from f2py .pyf generation

Merge pull request #184 from bnavigator/drop-py37

Drop support for Python 3.7

Merge pull request #182 from bnavigator/py311

Support Python 3.11

Merge pull request #178 from python-control/no-np1.23

Work around numpy/numpy#21889

slycot version 0.4.0

slycot version 0.3.5

slycot version 0.3.4