build(deps-dev): update nyc requirement from 12.0.2 to 13.0.1

Updates the requirements on [nyc](https://github.com/istanbuljs/nyc) to permit the latest version.
- [Release notes](https://github.com/istanbuljs/nyc/releases)
- [Changelog](https://github.com/istanbuljs/nyc/blob/master/CHANGELOG.md)
- [Commits](https://github.com/istanbuljs/nyc/commits/v13.0.1)

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

package.json

@@ -33,7 +33,7 @@
     "cz-conventional-changelog": "2.1.0",
     "dirty-chai": "2.0.1",
     "mocha": "5.2.0",
-    "nyc": "12.0.2",
+    "nyc": "13.0.1",
     "rimraf": "2.6.2",
     "semantic-release": "15.9.12",
     "standard": "11.0.1",