Update dependency eslint-plugin-flowtype to v3.4.2

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change	References
eslint-plugin-flowtype	devDependencies	minor	3.2.0 -> 3.4.2	source

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Release Notes

gajus/eslint-plugin-flowtype

### [`v3.4.2`](https://togithub.com/gajus/eslint-plugin-flowtype/releases/v3.4.2) [Compare Source](https://togithub.com/gajus/eslint-plugin-flowtype/compare/v3.4.1...v3.4.2) ##### Bug Fixes - fix async generator bug (fixes [#​387](https://togithub.com/gajus/eslint-plugin-flowtype/issues/387)) ([5adb546](https://togithub.com/gajus/eslint-plugin-flowtype/commit/5adb546)), closes [#​386](https://togithub.com/gajus/eslint-plugin-flowtype/issues/386) ### [`v3.4.1`](https://togithub.com/gajus/eslint-plugin-flowtype/releases/v3.4.1) [Compare Source](https://togithub.com/gajus/eslint-plugin-flowtype/compare/v3.4.0...v3.4.1) ##### Bug Fixes - remove deprecated rule from recommended config ([#​351](https://togithub.com/gajus/eslint-plugin-flowtype/issues/351)) ([7c50b55](https://togithub.com/gajus/eslint-plugin-flowtype/commit/7c50b55)) ### [`v3.4.0`](https://togithub.com/gajus/eslint-plugin-flowtype/releases/v3.4.0) [Compare Source](https://togithub.com/gajus/eslint-plugin-flowtype/compare/v3.3.0...v3.4.0) ##### Features - support arrow function type shorthand ([#​182](https://togithub.com/gajus/eslint-plugin-flowtype/issues/182)) ([58365a0](https://togithub.com/gajus/eslint-plugin-flowtype/commit/58365a0)) ### [`v3.3.0`](https://togithub.com/gajus/eslint-plugin-flowtype/releases/v3.3.0) [Compare Source](https://togithub.com/gajus/eslint-plugin-flowtype/compare/v3.2.2...v3.3.0) ##### Features - add no-mixed rule ([#​382](https://togithub.com/gajus/eslint-plugin-flowtype/issues/382)) ([5c61606](https://togithub.com/gajus/eslint-plugin-flowtype/commit/5c61606)) ### [`v3.2.2`](https://togithub.com/gajus/eslint-plugin-flowtype/releases/v3.2.2) [Compare Source](https://togithub.com/gajus/eslint-plugin-flowtype/compare/v3.2.1...v3.2.2) ##### Bug Fixes - update dependencies ([c40386b](https://togithub.com/gajus/eslint-plugin-flowtype/commit/c40386b)) ### [`v3.2.1`](https://togithub.com/gajus/eslint-plugin-flowtype/releases/v3.2.1) [Compare Source](https://togithub.com/gajus/eslint-plugin-flowtype/compare/v3.2.0...v3.2.1) ##### Bug Fixes - modify require-return-type about annotateUndefined ([#​355](https://togithub.com/gajus/eslint-plugin-flowtype/issues/355)) ([a405931](https://togithub.com/gajus/eslint-plugin-flowtype/commit/a405931))

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[codecov[bot]]

Codecov Report

Merging #42 into master will not change coverage. The diff coverage is n/a.

@@          Coverage Diff          @@
##           master    #42   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files           2      2           
  Lines          15     15           
=====================================
  Hits           15     15

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[KevinGrandon]

!merge

[old-fusion-bot[bot]]

Triggered Fusion.js build verification: https://buildkite.com/uberopensource/fusion-release-verification/builds/1546