update devDeps

package.json

@@ -64,6 +64,7 @@
     "jest": "^21.0.1",
     "lint-staged": "^4.3.0",
     "mockjs": "^1.0.1-beta3",
+    "pro-download": "^1.0.0",
     "react-container-query": "^0.9.1",
     "react-test-renderer": "^16.0.0",
     "redbox-react": "^1.3.2",