chore(package): update remark-cli to version 6.0.1

Closes #62

Author: greenkeeper[bot]

package.json

@@ -29,7 +29,7 @@
     "coveralls": "^3.0.2",
     "level-community": "^3.0.0",
     "nyc": "^12.0.2",
-    "remark-cli": "^5.0.0",
+    "remark-cli": "^6.0.1",
     "remark-collapse": "^0.1.2",
     "remark-git-contributors": "^0.2.1",
     "remark-github": "^7.0.3",