fix(deps): update react monorepo to v17

Author: renovate-bot

example/package.json

@@ -23,8 +23,8 @@
   "homepage": "https://github.com/teambition/ReactiveDB#readme",
   "dependencies": {
     "antd": "^2.7.3",
-    "react": "^15.4.2",
-    "react-dom": "^15.4.2"
+    "react": "^17.0.0",
+    "react-dom": "^17.0.0"
   },
   "devDependencies": {
     "typescript": "^4.0.0"