fix(deps): update dependency wpackagist-plugin/jetpack-boost to v4

This MR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
wpackagist-plugin/jetpack-boost (source)	3.13.1 -> 4.0.0

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This MR has been generated by Renovate Bot.

requested review from @crdeoliv

mentioned in issue #42

added 3 commits

• 436d1a30...4219e6e5 - 2 commits from branch mvp
• 058365b5 - fix(deps): update dependency wpackagist-plugin/jetpack-boost to v4

Compare with previous version

added 3 commits

• 058365b5...db87e250 - 2 commits from branch mvp
• 7ca5cd20 - fix(deps): update dependency wpackagist-plugin/jetpack-boost to v4

Compare with previous version