Use node-sass-chokidar to avoid infinite loop

Details:
facebook/create-react-app#2114

Author: mfogel

package-lock.json

@@ -5,15 +5,13 @@
   "license": "ISC",
   "standard": {
     "parser": "babel-eslint",
-    "plugins": [
-      "flowtype"
-    ]
+    "plugins": ["flowtype"]
   },
   "dependencies": {
     "bootstrap": "^4.0.0-beta.2",
     "firebase": "^4.7.0",
     "jquery": "^3.2.1",
-    "node-sass": "^4.7.2",
+    "node-sass-chokidar": "0.0.3",
     "npm-run-all": "^4.1.1",
     "react": "^16.2.0",
     "react-dom": "^16.2.0",
@@ -22,8 +20,8 @@
     "reactstrap": "^5.0.0-alpha.4"
   },
   "scripts": {
-    "build-css": "node-sass --include-path ./src --include-path ./node_modules src/ -o src/",
-    "watch-css": "npm run build-css && node-sass --include-path ./src --include-path ./node_modules src/ -o src/ --watch --recursive",
+    "build-css": "node-sass-chokidar --include-path ./src --include-path ./node_modules src/ -o src/",
+    "watch-css": "npm run build-css && node-sass-chokidar --include-path ./src --include-path ./node_modules src/ -o src/ --watch --recursive",
     "start-js": "react-scripts start",
     "start": "npm-run-all -p watch-css start-js",
     "build-js": "react-scripts build",