Build and upload PyNEC to PyPI #18

Job	Run time
Build PyNEC source distribution	2m 23s
Build PyNEC wheels on macos-arm	5m 27s
Build PyNEC wheels on linux	7m 25s
Test PyNEC on linux	31s
Test PyNEC on macos-arm	23s
upload_pypi	0s
	16m 9s

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