chore(package): update tslint to version 5.8.0

Closes #325

Author: greenkeeper[bot]

package.json

@@ -66,7 +66,7 @@
     "sass-loader": "6.0.3",
     "style-loader": "0.13.2",
     "to-string-loader": "1.1.5",
-    "tslint": "4.5.1",
+    "tslint": "5.8.0",
     "tslint-react": "2.4.0",
     "typescript": "2.2.1",
     "typescript-formatter": "5.1.1",