fix(package): update fs-extra to version 6.0.1

Closes #12

Author: greenkeeper[bot]

package.json

@@ -21,7 +21,7 @@
     "ora": "^1.3.0",
     "globby": "^7.1.1",
     "cosmiconfig": "^4.0.0",
-    "fs-extra": "^5.0.0",
+    "fs-extra": "^6.0.1",
     "find-cache-dir": "^1.0.0",
     "p-limit": "^1.1.0",
     "cacache": "^10.0.1",