tests

Update README to mention installing from PyPI #907

Job	Run time
test (ubuntu-latest, 3.12)	1m 1s
test (ubuntu-latest, 3.11)	59s
lint	13s
docs	16s
test (ubuntu-latest, 3.10)	1m 34s
Check for spelling errors	8s
test (ubuntu-latest, 3.9)	58s
test (ubuntu-latest, 3.8)	1m 10s
package-source	11s
test (macos-latest, 3.12)	1m 38s
package-wheel (macos-latest, arm64)	3m 26s
package-wheel (macos-latest, x86_64)	11m 17s
test (macos-latest, 3.11)	1m 10s
test (macos-latest, 3.10)	1m 20s
package-wheel (ubuntu-latest, aarch64)	25m 24s
test (macos-latest, 3.9)	2m 5s
package-wheel (ubuntu-latest, i686)	1m 15s
test (macos-latest, 3.8)	1m 37s
package-wheel (ubuntu-latest, x86_64)	4m 59s
test (windows-latest, 3.12)	5m 9s
package-wheel (windows-latest, AMD64)	11m 7s
test (windows-latest, 3.11)	3m 14s
package-wheel (windows-latest, x86)	3m 33s
test (windows-latest, 3.10)	5m 4s
test (windows-latest, 3.9)	3m 3s
test (windows-latest, 3.8)	3m 49s
publish	30s
	1h 36m 10s

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