fix(package): update asar to version 3.0.3

Closes #18

Author: greenkeeper[bot]

package.json

@@ -10,7 +10,7 @@
     "url": "git://github.com/ckarper/asar-fs.git"
   },
   "dependencies": {
-    "asar": "^0.13.0"
+    "asar": "^3.0.3"
   },
   "devDependencies": {
     "ava": "^0.19.0",