Bump nyc from 13.0.1 to 13.1.0

Bumps [nyc](https://github.com/istanbuljs/nyc) from 13.0.1 to 13.1.0.
- [Release notes](https://github.com/istanbuljs/nyc/releases)
- [Changelog](https://github.com/istanbuljs/nyc/blob/master/CHANGELOG.md)
- [Commits](istanbuljs/nyc@v13.0.1...v13.1.0)

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

Author: dependabot-support

package-lock.json

@@ -121,7 +121,7 @@
 		"eslint": "^5.9.0",
 		"eslint-config-google": "^0.10.0",
 		"jsdoc": "^3.5.5",
-		"nyc": "^13.0.1",
+		"nyc": "^13.1.0",
 		"opn-cli": "^4.0.0",
 		"recursive-readdir": "^2.1.1",
 		"rimraf": "^2.6.2",