fix: fixtures/attribute-behavior/package.json & fixtures/attribute-behavior/yarn.lock to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-Y18N-1021887

Author: snyk-bot

fixtures/attribute-behavior/package.json

@@ -7,7 +7,7 @@
     "glamor": "^2.20.40",
     "react": "^15.6.1",
     "react-dom": "^15.6.1",
-    "react-scripts": "1.0.11",
+    "react-scripts": "3.0.0",
     "react-virtualized": "^9.9.0"
   },
   "scripts": {