Relax version constraint of `numpy` to `<1.22`
Relax version constraint of `numpy` to `<1.22`

Installing/building earlier versions fails under Python 3.10. With the
new constraint, `pip` will select `numpy-1.21.6`, available as wheel
package for different platforms.
daq-tools/kotori,daq-tools/kotori,daq-tools/kotori,daq-tools/kotori,daq-tools/kotori,daq-tools/kotori,daq-tools/kotori