chore(package): update eslint-plugin-react to version 7.12.4

Author: greenkeeper[bot]

package.json

@@ -59,7 +59,7 @@
     "eslint-plugin-flowtype": "^2.50.0",
     "eslint-plugin-import": "^2.13.0",
     "eslint-plugin-jsx-a11y": "^6.1.1",
-    "eslint-plugin-react": "^7.10.0",
+    "eslint-plugin-react": "^7.12.4",
     "file-loader": "^1.1.11",
     "flow-bin": "^0.77.0",
     "html-webpack-plugin": "^3.2.0",