add-recommended-dependencies-as-extras_require-in-setup.cfg

See issue pandas-dev#47335.

pandas-dev#47335

recommended dependencies should have package mgmt facilitated through pandas.  This will make mgmt of pandas in production docker environments a lot simpler.

Author: JMBurley

setup.cfg

@@ -50,6 +50,12 @@ test =
     hypothesis>=5.5.3
     pytest>=6.0
     pytest-xdist>=1.31
+# optional extras for recommended dependencies
+# see: doc/source/getting_started/install.rst
+numexpr =
+    numexpr>=2.7.1
+bottleneck =
+    bottleneck>=1.3.1
 
 [build_ext]
 inplace = True