Typing-extensions as dependency for py3.9 #4909

Job	Run time
validate-dependency-specification	10s
install-with-pip	24s
install-with-conda (3.9, true)	54s
install-with-conda (3.10, true)	50s
install-with-pip ([atomic_tools,docs,notebook,rest,tests,tui])	1m 25s
install-with-conda (3.11, true)	42s
install-with-conda (3.12, true)	41s
install-with-conda (false)	1m 1s
create-conda-environment	36s
tests (3.9)	14m 43s
tests (3.10)	15m 28s
tests (3.11)	14m 46s
tests (3.12)	15m 58s
	1h 7m 38s

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