Update clap-basic to use new Arg methods#617

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c12i wants to merge 3 commits intorust-lang-nursery:masterfrom c12i:fix

+7-7

Commits on Sep 26, 2020

Update clap-basic to use new Arg methods
c12i
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Commits on Sep 27, 2020

Update clap version
c12i
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Commits on Oct 15, 2020

bump
c12i
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