fix(package): update react-highcharts to version 16.0.0

Closes #14

Author: greenkeeper[bot]

package.json

@@ -27,7 +27,7 @@
     "react-fontawesome": "^1.5.0",
     "react-ga": "^2.1.2",
     "react-google-maps": "^8.0.0",
-    "react-highcharts": "^12.0.0",
+    "react-highcharts": "^16.0.0",
     "react-json-tree": "^0.10.9",
     "react-syntax-highlighter": "^5.6.2"
   },