chore(deps-dev): bump np from 5.2.1 to 6.2.0

Bumps [np](https://github.com/sindresorhus/np) from 5.2.1 to 6.2.0.
- [Release notes](https://github.com/sindresorhus/np/releases)
- [Commits](sindresorhus/np@v5.2.1...v6.2.0)

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

package.json

@@ -34,7 +34,7 @@
     "eslint": "^6.7.2",
     "eslint-config-airbnb": "^6.2.0",
     "material-ui": "^0.20.2",
-    "np": "^5.0.3",
+    "np": "^6.2.0",
     "pre-commit": "~1.2.2",
     "react-toolbox": "^1.2.5",
     "umi-tools": "^0.4.0"