Update dependency argcomplete to v3.1.6

This MR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
argcomplete (changelog)	==3.1.4 -> ==3.1.6

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Release Notes

kislyuk/argcomplete

v3.1.6

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• Respect user choice in activate-global-python-argcomplete

v3.1.5

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• Escape colon in zsh completions. Fixes #​456

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