build(cargo): bump clap from 3.1.6 to 3.1.8

[dependabot[bot]]

Bumps clap from 3.1.6 to 3.1.8.

Release notes

Sourced from clap's releases.

v3.1.8

[3.1.8] - 2022-04-01

Fixes

• Add Debug impls to more types

v3.1.7

[3.1.7] - 2022-03-31

Fixes

• *(derive)* Abort, rather than ignore, when deriving ArgEnum` with non-unit unskipped variants

Changelog

Sourced from clap's changelog.

[3.1.8] - 2022-04-01

Fixes

• Add Debug impls to more types

[3.1.7] - 2022-03-31

Fixes

• *(derive)* Abort, rather than ignore, when deriving ArgEnum` with non-unit unskipped variants

Commits

• 08f7404 chore: Release
• 6aa40ad docs: Update changelog
• 732830a Merge pull request #3598 from dragonrider7225/bring-back-debug-impls
• 17fed36 fix: Bring forward Debug impls from v2
• c75d264 chore: Release
• b774370 docs: Update changelog
• 71ef887 Merge pull request #3591 from Shir0kamii/fix-ArgEnum-non-unit
• fb4755d feat(derive): Don't abort when non-unit variant is skipped
• ee3d12e fix(derive): Abort on non-unit variant
• 06f855f Merge pull request #3582 from ducaale/fix-docs
• Additional commits viewable in compare view

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