TASK: Update dependency eslint-plugin-flowtype to v4.7.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
eslint-plugin-flowtype	4.6.0 -> 4.7.0

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Release Notes

gajus/eslint-plugin-flowtype

### [`v4.7.0`](https://togithub.com/gajus/eslint-plugin-flowtype/releases/v4.7.0) [Compare Source](https://togithub.com/gajus/eslint-plugin-flowtype/compare/v4.6.0...v4.7.0) ##### Features - require-exact-type detects nested objects ([#​441](https://togithub.com/gajus/eslint-plugin-flowtype/issues/441)) ([463b74e](https://togithub.com/gajus/eslint-plugin-flowtype/commit/463b74e40b227852d578169f37839fb59d1f16bd))

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