chore(deps-dev): update react-dom requirement from ~16.6.0 to ~16.7.0 (…

…#1286)

Updates the requirements on [react-dom](https://github.com/facebook/react) to permit the latest version.
- [Release notes](https://github.com/facebook/react/releases)
- [Changelog](https://github.com/facebook/react/blob/master/CHANGELOG.md)
- [Commits](https://github.com/facebook/react/commits/v16.7.0)

Signed-off-by: dependabot[bot] <support@dependabot.com>

packages/stryker-jest-runner/package.json

@@ -43,7 +43,7 @@
     "@types/semver": "~5.5.0",
     "jest": "~23.6.0",
     "react": "~16.7.0",
-    "react-dom": "~16.6.0",
+    "react-dom": "~16.7.0",
     "react-scripts": "~2.1.0",
     "react-scripts-ts": "~3.1.0",
     "stryker-api": "^0.22.1"