update node to 20 #130

Job	Run time
Test pip (Python 3.9, ubuntu-latest)	16s
Test pip (Python 3.9, ubuntu-latest)	16s
Test pip (Python pypy-3.7-v7.x, ubuntu-latest)	9m 43s
Test pipenv (Python 3.9, ubuntu-latest)	26s
Test pip (Python pypy-3.7-v7.x, ubuntu-latest)	9m 32s
Test pip (Python 3.9, windows-latest)	1m 38s
Test pip (Python 3.9, windows-latest)	1m 28s
Test pipenv (Python pypy-3.9-v7.x, ubuntu-latest)	41s
Test pip (Python pypy-3.7-v7.x, windows-latest)	17m 36s
Test pipenv (Python 3.9, ubuntu-latest)	31s
Test pip (Python pypy-3.7-v7.x, windows-latest)	18m 27s
Test pipenv (Python 3.9, windows-latest)	1m 5s
Test pipenv (Python pypy-3.9-v7.x, ubuntu-latest)	41s
Test pip (Python 3.9, macos-latest)	28s
Test pipenv (Python 3.9, windows-latest)	1m 27s
Test pipenv (Python pypy-3.9-v7.x, windows-latest)	1m 55s
Test pip (Python pypy-3.7-v7.x, macos-latest)	17m 47s
Test pipenv (Python pypy-3.9-v7.x, windows-latest)	1m 49s
Test pipenv (Python 3.9, macos-latest)	42s
Test pipenv (Python 3.9, macos-latest)	1m 11s
Test pip (Python 3.9, macos-latest)	20s
Test pipenv (Python pypy-3.9-v7.x, macos-latest)	51s
Test pipenv (Python pypy-3.9-v7.x, macos-latest)	1m 12s
Test pip (Python pypy-3.7-v7.x, macos-latest)	23m 23s
Test poetry (Python 3.9, ubuntu-latest)	17s
Test poetry (Python pypy-3.8, ubuntu-latest)	19s
Test poetry (Python 3.9, windows-latest)	47s
Test poetry (Python pypy-3.8, windows-latest)	1m 8s
Test poetry (Python 3.9, macos-latest)	29s
Test poetry (Python pypy-3.8, macos-latest)	44s
	1h 57m 9s

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