Update dependency np to v6.2.1 (#72)

Author: renovate-bot

package.json

@@ -42,7 +42,7 @@
     "ava": "3.5.1",
     "husky": "4.2.3",
     "lint-staged": "10.0.9",
-    "np": "6.2.0",
+    "np": "6.2.1",
     "npm-run-all": "4.1.5",
     "prettier": "2.0.2",
     "rimraf": "3.0.2",