chore(deps): update commitlint monorepo to v8 (major)

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
@commitlint/cli	devDependencies	major	7.6.1 -> 8.0.0
@commitlint/config-conventional	devDependencies	major	7.6.0 -> 8.0.0
@commitlint/prompt-cli	devDependencies	major	7.6.1 -> 8.0.0

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Release Notes

conventional-changelog/commitlint

v8.0.0

Compare Source

Breaking Changes

• fix: avoid excessive help text #​606 (#​637)
  The commitlint default formatter is now silent for reports without warnings or errors.
  Scripts relying on the success output of commitlint can restore the former output by specifying the --verbose flag.

7.6.2

• Republish packages with out of sync artifacts

7.6.1 (2019-05-09)

Bug Fixes

• ensure format() is available as commonjs default export #​645 (ec3da92)
• handle absolute config paths correctly #​647 (49b3a77)

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[coveralls]

Coverage remained the same at 100.0% when pulling 697b4cc on renovate/major-commitlint-monorepo into be1a1fa on master.