Update dependency eslint-plugin-wpcalypso to v5

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
eslint-plugin-wpcalypso	devDependencies	major	4.1.0 -> 5.0.0

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Release Notes

Automattic/wp-calypso

v5.0.0

Compare Source

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[matticbot]

Caution: This PR has changes that must be merged to WordPress.com
Hello renovate[bot]! These changes need to be synced to WordPress.com - If you 're an a11n, please commandeer and confirm D46891-code works as expected before merging this PR. Once this PR is merged, please commit the changes to WP.com. Thank you!
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[jeherve]

closing in favor of #16566.