Bump the stryker group with 2 updates (#1801)

Bumps the stryker group with 2 updates: [@stryker-mutator/core](https://github.com/stryker-mutator/stryker-js/tree/HEAD/packages/core) and [@stryker-mutator/tap-runner](https://github.com/stryker-mutator/stryker-js/tree/HEAD/packages/tap-runner).


Updates `@stryker-mutator/core` from 8.6.0 to 8.7.0
- [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/v8.7.0/packages/core)

Updates `@stryker-mutator/tap-runner` from 8.6.0 to 8.7.0
- [Release notes](https://github.com/stryker-mutator/stryker-js/releases)
- [Changelog](https://github.com/stryker-mutator/stryker-js/blob/master/packages/tap-runner/CHANGELOG.md)
- [Commits](https://github.com/stryker-mutator/stryker-js/commits/v8.7.0/packages/tap-runner)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>