Update humann to 3.9

[BiocondaBot]

Update humann: 3.8 → 3.9

Info	Link or Description
Recipe	recipes/humann (click to view/edit other files)
Summary	HUMAnN: The HMP Unified Metabolic Analysis Network, version 3
Home	http://huttenhower.sph.harvard.edu/humann
Releases	https://pypi.org/pypi/humann/json

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