Update pyo3 requirement from 0.22.0 to 0.23.1 #613

Job	Run time
Check	21s
no-std build (aarch64-unknown-none)	25s
no-std build (thumbv6m-none-eabi)	26s
Coverage	38s
Lints	21s
Test Suite (ubuntu-latest, MSRV)	2m 55s
Test Suite (ubuntu-latest, stable)	2m 51s
Test Suite (macos-latest, MSRV)	3m 36s
Test Suite (macos-latest, stable)	1m 48s
Test Suite (windows-latest, MSRV)	8m 47s
Test Suite (windows-latest, stable)	9m 2s
Release	0s
	31m 10s

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