chore(deps): update stryker monorepo to v3.2.4

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
@stryker-mutator/core	devDependencies	patch	3.2.3 -> 3.2.4
@stryker-mutator/javascript-mutator	devDependencies	patch	3.2.3 -> 3.2.4
@stryker-mutator/jest-runner	devDependencies	patch	3.2.3 -> 3.2.4

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Release Notes

stryker-mutator/stryker

### [`v3.2.4`](https://togithub.com/stryker-mutator/stryker/blob/master/CHANGELOG.md#​324-httpsgithubcomstryker-mutatorstrykercomparev323v324-2020-05-18) [Compare Source](https://togithub.com/stryker-mutator/stryker/compare/v3.2.3...v3.2.4) ##### Bug Fixes - **ts:** support ts 3.9 on windows in the typescript-transpiler ([#​2215](https://togithub.com/stryker-mutator/stryker/issues/2215)) ([0fab74f](https://togithub.com/stryker-mutator/stryker/commit/0fab74f4af97e6faf0eee0ba44f935af7c4ccbb5))

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Codecov Report

Merging #213 into master will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #213   +/-   ##
=======================================
  Coverage   37.58%   37.58%           
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  Files          34       34           
  Lines         282      282           
  Branches       37       37           
=======================================
  Hits          106      106           
  Misses        155      155           
  Partials       21       21           

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