Update dependency argcomplete to v2

This MR contains the following updates:

Package	Type	Update	Change
argcomplete (changelog)	ironbank-pypi	major	1.12.3 -> 2.0.0

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Release Notes

kislyuk/argcomplete

v2.0.0

Compare Source

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• Truncate input after cursor. Fixes #​351 (#​352)

• Support of path completion in fish #​327 (#​359)

• Drop support for Python 2.7 and 3.5 (#​361)

• Add support for Python 3.10 (#​356)

• Test, documentation, and release infrastructure improvements

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