Added some basic shared components, utils, hooks

client/package.json

@@ -37,6 +37,7 @@
   "dependencies": {
     "axios": "^0.19.0",
     "color": "^3.1.2",
+    "core-js": "^3.4.7",
     "history": "^4.10.1",
     "jwt-decode": "^2.2.0",
     "lodash": "^4.17.15",
@@ -47,6 +48,7 @@
     "react-dom": "^16.12.0",
     "react-router-dom": "^5.1.2",
     "react-textarea-autosize": "^7.1.2",
+    "react-transition-group": "^4.3.0",
     "styled-components": "^4.4.1",
     "sweet-pubsub": "^1.1.2"
   },