Update dependency web-vitals to v2.1.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
web-vitals	2.0.1 -> 2.1.0

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Release Notes

GoogleChrome/web-vitals

### [`v2.1.0`](https://togithub.com/GoogleChrome/web-vitals/blob/master/CHANGELOG.md#v210-2021-07-01) [Compare Source](https://togithub.com/GoogleChrome/web-vitals/compare/v2.0.1...v2.1.0) - Add batch reporting support and guidance ([#​166](https://togithub.com/GoogleChrome/web-vitals/pull/166)

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