Update for Web3.js v4.15.0

Author: Dan Forbes

templates/demo/web3js-react-dapp-demo/package-lock.json

@@ -21,9 +21,9 @@
     "typescript": "^4.9.5",
     "uuid": "^10.0.0",
     "web-vitals": "^2.1.4",
-    "web3": "^4.14.0",
-    "web3-eth": "^4.10.0",
-    "web3-eth-contract": "^4.7.0"
+    "web3": "^4.15.0",
+    "web3-eth": "^4.11.0",
+    "web3-eth-contract": "^4.7.1"
   },
   "scripts": {
     "start": "react-scripts start",