chore(deps): update stryker-js monorepo to v8.4.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@stryker-mutator/core (source)	8.3.0 -> 8.4.0
@stryker-mutator/typescript-checker (source)	8.3.0 -> 8.4.0
@stryker-mutator/vitest-runner (source)	8.3.0 -> 8.4.0

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Release Notes

stryker-mutator/stryker-js (@​stryker-mutator/core)

### [`v8.4.0`](https://togithub.com/stryker-mutator/stryker-js/blob/HEAD/packages/core/CHANGELOG.md#840-2024-08-06) [Compare Source](https://togithub.com/stryker-mutator/stryker-js/compare/v8.3.0...v8.4.0) ##### Bug Fixes - **node-18:** revert changes to support node 18 again ([#​4935](https://togithub.com/stryker-mutator/stryker-js/issues/4935)) ([42162bd](https://togithub.com/stryker-mutator/stryker-js/commit/42162bd36edd5a9f63beff10303259cfff709b0b)) ##### Features - **clear-text-reporter:** Add "skipFull" option ([#​4875](https://togithub.com/stryker-mutator/stryker-js/issues/4875)) ([da213ad](https://togithub.com/stryker-mutator/stryker-js/commit/da213ad70c437617f78fe2e9f175d15c07e1697b))

stryker-mutator/stryker-js (@​stryker-mutator/typescript-checker)

### [`v8.4.0`](https://togithub.com/stryker-mutator/stryker-js/blob/HEAD/packages/typescript-checker/CHANGELOG.md#840-2024-08-06) [Compare Source](https://togithub.com/stryker-mutator/stryker-js/compare/v8.3.0...v8.4.0) ##### Bug Fixes - **node-18:** revert changes to support node 18 again ([#​4935](https://togithub.com/stryker-mutator/stryker-js/issues/4935)) ([42162bd](https://togithub.com/stryker-mutator/stryker-js/commit/42162bd36edd5a9f63beff10303259cfff709b0b))

stryker-mutator/stryker-js (@​stryker-mutator/vitest-runner)

### [`v8.4.0`](https://togithub.com/stryker-mutator/stryker-js/blob/HEAD/packages/vitest-runner/CHANGELOG.md#840-2024-08-06) [Compare Source](https://togithub.com/stryker-mutator/stryker-js/compare/v8.3.0...v8.4.0) ##### Bug Fixes - **node-18:** revert changes to support node 18 again ([#​4935](https://togithub.com/stryker-mutator/stryker-js/issues/4935)) ([42162bd](https://togithub.com/stryker-mutator/stryker-js/commit/42162bd36edd5a9f63beff10303259cfff709b0b))

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