chore(deps): update peerdependency firebase to ^7.16.0

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
firebase (source, changelog)	peerDependencies	minor	^7.15.5 -> ^7.16.0
firebase (source, changelog)	devDependencies	minor	^7.15.5 -> ^7.16.0

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Release Notes

firebase/firebase-js-sdk

### [`v7.16.0`](https://togithub.com/firebase/firebase-js-sdk/compare/firebase@7.15.5...firebase@7.16.0) [Compare Source](https://togithub.com/firebase/firebase-js-sdk/compare/firebase@7.15.5...firebase@7.16.0)

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