Update workflows to use .conda for conda package builds #138

Job	Run time
build_linux (3.9)	2m 26s
build_windows (3.9)	16m 28s
build_linux (3.10)	2m 14s
build_windows (3.10)	10m 42s
test_linux (3.9, 1.26*, false, ubuntu-latest)	1m 8s
test_linux (3.10, 1.26*, false, ubuntu-latest)	1m 31s
test_windows (3.9, 1.26*, false, windows-2019)	2m 34s
test_windows (3.10, 1.26*, false, windows-2019)	2m 28s
	39m 31s

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