Move history to devDependencies

Author: sonaye

package.json

@@ -49,6 +49,7 @@
     "eslint-plugin-react": "^5.1.1",
     "file-loader": "^0.8.5",
     "highlight.js": "^9.3.0",
+    "history": "^3.0.0",
     "hjs-webpack": "^8.1.0",
     "jsdom": "^9.2.1",
     "marked": "^0.3.17",