License-Update: Copyright year updated to 2022.
Changelog:
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Cleaned up use of cPickle. Contributed by Sandro Tosi in #62.
Cleaned up more dead Python 2 code.
Added Python 3.11 wheels.
Dropped support for Python 3.6.
Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>