bump bs

Author: chenglou

package.json

@@ -28,7 +28,7 @@
     "reason-react": "0.7.0"
   },
   "devDependencies": {
-    "bs-platform": "5.0.4",
+    "bs-platform": "7.1.1",
     "compression-webpack-plugin": "^3.0.0",
     "css-loader": "^3.0.0",
     "electrode-bundle-analyzer": "^1.0.1",