fixed circleci build and test error

Author: dchen278

package.json

@@ -68,7 +68,7 @@
   "scripts": {
     "start": "react-scripts start",
     "build": "react-scripts build",
-    "test": "react-scripts test",
+    "test": "react-scripts test --collectCoverageFrom=src/**/*.js --collectCoverageFrom=!src/modules/crossword/*.js",
     "eject": "react-scripts eject",
     "lint": "eslint . --fix"
   },