chore(package): update dependencies

Author: greenkeeper[bot]

package.json

@@ -50,7 +50,7 @@
   "license": "MIT",
   "dependencies": {
     "builddependencies": "^0.0.1",
-    "prebuild-install": "2.1.0"
+    "prebuild-install": "2.1.2"
   },
   "buildDependencies": [
     "async",
@@ -61,7 +61,7 @@
     "async": "^2.1.4",
     "ci-publish": "^1.3.0",
     "download-manager": "^0.1.3",
-    "fs-extra": "^2.0.0",
+    "fs-extra": "^3.0.1",
     "prebuild": "^6.0.0"
   },
   "main": "index.js",