Read repodata.json using nl::json (rerun) #52

Job	Run time
libmamba tests (ubuntu-latest, Release)	7m 9s
libmamba tests (ubuntu-latest, Debug)	7m 34s
libmamba tests (macos-latest, Release)	1m 17s
libmamba tests (macos-latest, Debug)	7m 15s
Mamba tests (ubuntu-latest, Release, 3.8)	12m 28s
Mamba tests (ubuntu-latest, Debug, 3.8)	12m 55s
Mamba tests (macos-latest, Release, 3.8)	5m 7s
Mamba tests (macos-latest, Debug, 3.8)	4m 45s
Micromamba integration tests (ubuntu-latest, Release)	25m 47s
Micromamba integration tests (ubuntu-latest, Debug)	26m 18s
Micromamba integration tests (macos-latest, Release)	13m 18s
Micromamba integration tests (macos-latest, Debug)	14m 4s
	2h 17m 57s

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