Update react-scripts from 3.4.4 to 4.0.0

Ejected the create-react-app and fixed 2 security vulnerabilities

Author: Sean Prashad

package-lock.json

@@ -18,7 +18,7 @@
     "react-ga": "^2.7.0",
     "react-icons": "^3.11.0",
     "react-markdown": "^4.3.1",
-    "react-scripts": "^3.4.4",
+    "react-scripts": "4.0.0",
     "react-scroll": "^1.8.0",
     "react-table": "^7.6.3",
     "react-test-renderer": "^16.14.0",
@@ -28,7 +28,7 @@
   },
   "devDependencies": {
     "babel-eslint": "^10.0.3",
-    "eslint": "^6.8.0",
+    "eslint": "^7.11.0",
     "eslint-config-airbnb": "^18.2.1",
     "eslint-config-prettier": "^6.15.0",
     "eslint-plugin-import": "^2.22.1",