fix(package): update react-syntax-highlighter to version 6.0.0

Author: greenkeeper[bot]

package.json

@@ -29,7 +29,7 @@
     "react-google-maps": "^8.0.0",
     "react-highcharts": "^12.0.0",
     "react-json-tree": "^0.10.9",
-    "react-syntax-highlighter": "^5.6.2"
+    "react-syntax-highlighter": "^6.0.0"
   },
   "devDependencies": {
     "babel-jest": "^21.0.0",