Changes from 1.9.2 to 1.10.0

Updated vendored C-Blosc to 1.21.0.
Wheels for Intel (32 and 64 bits) and all major OS (Win, Linux, Mac) are here.
The wheels have support for runtime detection for AVX2, so it will be
automatically leveraged in case the local host has AVX2. No need anymore to
worry about using different binaries for CPUs not having AVX2 hardware.

Also, we are distributing binaries for C-Blosc libraries (dynamic and static)
and headers. This way, people trying to use the C-Blosc library can use the
python-blosc wheels to install the necessary development files. For details,
see: https://github.com/Blosc/c-blosc/blob/master/COMPILING_WITH_WHEELS.rst

We gratefully acknowledge Jeff Hammerbacher for supporting the addition of
wheels for Blosc.
Officially drop support for Python < 3.7. Although we did not any explicit
action that is incompatible with older Python versions, we only provide
wheels for Python >= 3.7 (til 3.9).

Provide feedback