use numpy 1.22.2

[johng42]

mitigate https://www.cve.org/CVERecord?id=CVE-2021-41495 and https://www.cve.org/CVERecord?id=CVE-2021-41496

buffer overflow and NPE fixes

These are corner cases - to exploit either fix, you need to be a priveleged user anyway

[fhchl]

Thanks for the pull request, John. As the Numpy version is unspecified right now, using pip install would always get the updated package automatically. What is your use-case to specify this version specifically?