Bump nyc from 12.0.1 to 13.0.1 (#1992)

Bumps [nyc](https://github.com/istanbuljs/nyc) from 12.0.1 to 13.0.1.
- [Release notes](https://github.com/istanbuljs/nyc/releases)
- [Changelog](https://github.com/istanbuljs/nyc/blob/master/CHANGELOG.md)
- [Commits](https://github.com/istanbuljs/nyc/compare/v12.0.1...v13.0.1)

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

package.json

@@ -150,7 +150,7 @@
     "next": "^5.0.0",
     "nock": "^9.3.2",
     "node-fetch": "^2.0.0",
-    "nyc": "^12.0.1",
+    "nyc": "^13.0.1",
     "opn-cli": "^3.1.0",
     "prettier": "1.14.2",
     "prettier-check": "^2.0.0",