exclude coverage from tslint.json

Author: alexandrudanpop

packages/react-scripts/template/tslint.json

@@ -3,7 +3,8 @@
   "linterOptions": {
     "exclude": [
       "config/**/*.js",
-      "node_modules/**/*.ts"
+      "node_modules/**/*.ts",
+      "coverage/lcov-report/*.js"
     ]
   }
 }