build(deps): bump undici, hardhat and @nomiclabs/hardhat-etherscan (#1634)

Bumps [undici](https://github.com/nodejs/undici), [hardhat](https://github.com/nomiclabs/hardhat) and [@nomiclabs/hardhat-etherscan](https://github.com/nomiclabs/hardhat). These dependencies needed to be updated together.

Updates `undici` from 4.16.0 to 5.10.0
- [Release notes](https://github.com/nodejs/undici/releases)
- [Commits](https://github.com/nodejs/undici/compare/v4.16.0...v5.10.0)

Updates `hardhat` from 2.9.2 to 2.11.2
- [Release notes](https://github.com/nomiclabs/hardhat/releases)
- [Commits](https://github.com/nomiclabs/hardhat/compare/hardhat@2.9.2...hardhat@2.11.2)

Updates `@nomiclabs/hardhat-etherscan` from 3.0.3 to 3.1.0
- [Release notes](https://github.com/nomiclabs/hardhat/releases)
- [Commits](https://github.com/nomiclabs/hardhat/compare/@nomiclabs/hardhat-etherscan@3.0.3...@nomiclabs/hardhat-etherscan@3.1.0)

---
updated-dependencies:
- dependency-name: undici
  dependency-type: indirect
- dependency-name: hardhat
  dependency-type: direct:development
- dependency-name: "@nomiclabs/hardhat-etherscan"
  dependency-type: direct:development
...

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contracts/basic-bandwidth-generation/package.json

@@ -1,12 +1,12 @@
 {
   "devDependencies": {
     "@nomiclabs/hardhat-ethers": "^2.0.5",
-    "@nomiclabs/hardhat-etherscan": "^3.0.3",
+    "@nomiclabs/hardhat-etherscan": "^3.1.0",
     "@nomiclabs/hardhat-waffle": "^2.0.3",
     "chai": "^4.3.6",
     "ethereum-waffle": "^3.4.4",
     "ethers": "^5.6.1",
-    "hardhat": "^2.9.2",
+    "hardhat": "^2.11.2",
     "solidity-coverage": "^0.7.20"
   },
   "dependencies": {