update tslint rules

Author: tiagoschenkel

tslint.json

@@ -40,7 +40,7 @@
     "no-construct": true,
     "no-debugger": true,
     "no-duplicate-variable": true,
-    "no-empty": false,
+    "no-empty": true,
     "no-eval": true,
     "no-inferrable-types": false,
     "no-shadowed-variable": true,