Tests

Migrate Channel::make_channel to resolve multi channels #150

Job	Run time
Unix tests (macos-latest, debug) / Build binaries	3m 45s
Unix tests (macos-latest, release) / Build binaries	1s
Unix tests (ubuntu-latest, debug) / Build binaries	46s
Unix tests (ubuntu-latest, release) / Build binaries	2m 48s
Windows tests (windows-2019, release) / Build binaries	3m 54s
Unix tests (ubuntu-latest, debug) / Test libmamba	52s
Unix tests (ubuntu-latest, debug) / Test integration micromamba	3m 15s
Unix tests (ubuntu-latest, debug) / Test libmamba Python bindings	1m 3s
Unix tests (ubuntu-latest, release) / Test integration micromamba	1m 11s
Unix tests (ubuntu-latest, release) / Test libmamba	40s
Unix tests (ubuntu-latest, release) / Test libmamba Python bindings	57s
Unix tests (macos-latest, debug) / Test integration micromamba	1s
Unix tests (macos-latest, debug) / Test libmamba	1s
Unix tests (macos-latest, debug) / Test libmamba Python bindings	1s
Unix tests (macos-latest, release) / Test integration micromamba	1s
Unix tests (macos-latest, release) / Test libmamba	1s
Unix tests (macos-latest, release) / Test libmamba Python bindings	1s
Windows tests (windows-2019, release) / Test libmamba	1s
Windows tests (windows-2019, release) / Test integration micromamba	1s
Windows tests (windows-2019, release) / Test libmamba Python bindings	1s
	19m 21s

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