Add support for Python 3.10. (rapidsai#1166)

This PR adds support for Python 3.10.

This set of changes aligns with the behavior I'd like to see across RAPIDS for the Python version changes described in RAPIDS Support Notice (RSN) 22 and 23. rapidsai/docs#310

Authors:
  - Bradley Dice (https://github.com/bdice)

Approvers:
  - Mark Harris (https://github.com/harrism)

URL: rapidsai#1166

Author: bdice

README.md

@@ -48,7 +48,7 @@ conda install -c rapidsai -c conda-forge -c nvidia \
 We also provide [nightly Conda packages](https://anaconda.org/rapidsai-nightly) built from the HEAD
 of our latest development branch.
 
-Note: RMM is supported only on Linux, and only tested with Python versions 3.8 and 3.9.
+Note: RMM is supported only on Linux, and only tested with Python versions 3.8 and 3.10.
 
 
 Note: The RMM package from Conda requires building with GCC 9 or later. Otherwise, your application may fail to build.

python/setup.py

@@ -33,6 +33,7 @@ def get_versions():
         "Programming Language :: Python",
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
+        "Programming Language :: Python :: 3.10",
     ],
     # Include the separately-compiled shared library
     extras_require={"test": ["pytest"]},