Tests

fix config precedence for base env #188

Job	Run time
Unix tests (macos-latest, debug) / Build binaries	2m 26s
Unix tests (macos-latest, release) / Build binaries	5m 32s
Unix tests (ubuntu-latest, debug) / Build binaries	58s
Unix tests (ubuntu-latest, release) / Build binaries	2m 47s
Windows tests (windows-2019, release) / Build binaries	2m 19s
Unix tests (ubuntu-latest, debug) / Test libmamba Python bindings	1m 2s
Unix tests (ubuntu-latest, debug) / Test integration micromamba	18m 23s
Unix tests (ubuntu-latest, debug) / Test libmamba	41s
Windows tests (windows-2019, release) / Test libmamba Python bindings	3m 31s
Windows tests (windows-2019, release) / Test integration micromamba	41m 28s
Windows tests (windows-2019, release) / Test libmamba	3m 27s
Unix tests (macos-latest, debug) / Test libmamba	2m 19s
Unix tests (macos-latest, debug) / Test libmamba Python bindings	3m 2s
Unix tests (macos-latest, debug) / Test integration micromamba	1h 0m 39s
Unix tests (ubuntu-latest, release) / Test integration micromamba	15m 53s
Unix tests (ubuntu-latest, release) / Test libmamba	43s
Unix tests (ubuntu-latest, release) / Test libmamba Python bindings	55s
Unix tests (macos-latest, release) / Test integration micromamba	51m 56s
Unix tests (macos-latest, release) / Test libmamba	2m 25s
Unix tests (macos-latest, release) / Test libmamba Python bindings	1m 51s
	3h 42m 17s

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