fix(package): update fs-extra to version 8.0.0

Closes #39

Author: greenkeeper[bot]

package.json

@@ -39,7 +39,7 @@
     "bunyan": "1.8.12",
     "conventional-commit-types": "2.2.0",
     "ejs": "2.5.7",
-    "fs-extra": "5.0.0",
+    "fs-extra": "8.0.0",
     "lodash": "4.17.5",
     "markdown-magic": "0.1.20",
     "markdown-magic-install-command": "1.3.1",