chore(package): update eslint-plugin-react to version 7.12.2 (#108)

Author: tmcw

package.json

@@ -40,7 +40,7 @@
     "es6-promise": "^4.1.0",
     "eslint": "^4.1.0",
     "eslint-plugin-babel": "^5.0.0",
-    "eslint-plugin-react": "^7.0.0",
+    "eslint-plugin-react": "^7.12.2",
     "github-slugger": "^1.0.1",
     "highlight.js": "^9.2.0",
     "isomorphic-fetch": "^2.2.0",