fix(package): update @skpm/builder to version 0.5.15

Author: greenkeeper[bot]

package.json

@@ -10,7 +10,7 @@
   },
   "dependencies": {
     "exp": "^57.0.1",
-    "@skpm/builder": "0.5.12",
+    "@skpm/builder": "0.5.15",
     "expo": "^31.0.0",
     "react": "16.8.2",
     "react-dom": "^16.8.2",