Update package.json

Author: tomhamiltonstubber

package.json

@@ -40,7 +40,7 @@
     "html-webpack-plugin": "^3.2.0",
     "marked": "^0.7.0",
     "node-sass": "^4.12.0",
-    "pretty": "^2.0.0"
+    "pretty": "^2.0.0",
     "raven-js": "^3.27.2",
     "react": "^16.9.0",
     "react-app-rewired": "^1.6.2",