Note that python 3.10 works, but builds don't work yet

Numpy doesn't yet have builds for 3.10 (it's still on RC1), but
cibuildwheels is trying to use it, and builds fail on github for now.

README.md

@@ -34,14 +34,14 @@ python -m pip install numpy-quaternion
 ```
 
 (Optionally add `--user` after `install` in those last two if you're
-not using a python environment — though you should start.)
+not using a python environment — though you should start.)
 
 
 ## Dependencies
 
 The basic requirements for this code are reasonably current versions
 of `python` and `numpy`.  In particular, `python` versions 3.6 through
-3.9 are routinely tested.  Python 2.7 *might* still work, but even
+3.10 are routinely tested.  Python 2.7 *might* still work, but even
 numpy no longer supports this version, so your mileage may vary.
 Also, any `numpy` version [greater than
 1.13.0](https://github.com/moble/quaternion/issues/114) should work,

setup.py

@@ -16,7 +16,7 @@
 
 
 # Set this first for easier replacement
-version = "2021.8.25.12.11.29"
+version = "2021.8.25.12.59.41"
 
 if "win" in platform.lower() and not "darwin" in platform.lower():
     extra_compile_args = ["/O2"]

src/quaternion/__init__.py

@@ -1,7 +1,7 @@
 # Copyright (c) 2020, Michael Boyle
 # See LICENSE file for details: <https://github.com/moble/quaternion/blob/main/LICENSE>
 
-__version__ = "2021.8.25.12.11.29"
+__version__ = "2021.8.25.12.59.41"
 __doc_title__ = "Quaternion dtype for NumPy"
 __doc__ = "Adds a quaternion dtype to NumPy."
 __all__ = ['quaternion',