build(deps-dev): bump @stryker-mutator/core and @stryker-mutator/jest…

…-runner

Bumps [@stryker-mutator/core](https://github.com/stryker-mutator/stryker-js/tree/HEAD/packages/core) and [@stryker-mutator/jest-runner](https://github.com/stryker-mutator/stryker-js/tree/HEAD/packages/jest-runner). These dependencies needed to be updated together.

Updates `@stryker-mutator/core` from 5.6.1 to 7.3.0
- [Release notes](https://github.com/stryker-mutator/stryker-js/releases)
- [Changelog](https://github.com/stryker-mutator/stryker-js/blob/master/packages/core/CHANGELOG.md)
- [Commits](https://github.com/stryker-mutator/stryker-js/commits/v7.3.0/packages/core)

Updates `@stryker-mutator/jest-runner` from 5.6.1 to 7.3.0
- [Release notes](https://github.com/stryker-mutator/stryker-js/releases)
- [Changelog](https://github.com/stryker-mutator/stryker-js/blob/master/packages/jest-runner/CHANGELOG.md)
- [Commits](https://github.com/stryker-mutator/stryker-js/commits/v7.3.0/packages/jest-runner)

---
updated-dependencies:
- dependency-name: "@stryker-mutator/core"
  dependency-type: direct:development
  update-type: version-update:semver-major
- dependency-name: "@stryker-mutator/jest-runner"
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>