Update pkg-dir to the latest version 🚀 (#139)

* fix(package): update pkg-dir to version 4.2.0

* chore(package): update lockfile package-lock.json

Author: greenkeeper[bot]

package-lock.json

@@ -54,7 +54,7 @@
     "fs": "0.0.2",
     "jimp": "^0.6.1",
     "mockeer": "0.0.4",
-    "pkg-dir": "4.1.0",
+    "pkg-dir": "4.2.0",
     "puppeteer": "^1.8.0",
     "type-detect": "^4.0.8"
   },