Bump @nomiclabs/hardhat-etherscan from 2.1.8 to 3.0.3

Bumps [@nomiclabs/hardhat-etherscan](https://github.com/nomiclabs/hardhat) from 2.1.8 to 3.0.3.
- [Release notes](https://github.com/nomiclabs/hardhat/releases)
- [Commits](https://github.com/nomiclabs/hardhat/compare/@nomiclabs/hardhat-etherscan@2.1.8...@nomiclabs/hardhat-etherscan@3.0.3)

---
updated-dependencies:
- dependency-name: "@nomiclabs/hardhat-etherscan"
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -34,7 +34,7 @@
   },
   "devDependencies": {
     "@nomiclabs/hardhat-ethers": "^2.0.4",
-    "@nomiclabs/hardhat-etherscan": "^2.1.8",
+    "@nomiclabs/hardhat-etherscan": "^3.0.3",
     "@nomiclabs/hardhat-solhint": "^2.0.0",
     "@nomiclabs/hardhat-waffle": "^2.0.2",
     "@shardlabs/starknet-hardhat-plugin": "^0.5.2",

yarn.lock

@@ -760,18 +760,18 @@
   resolved "https://registry.yarnpkg.com/@nomiclabs/hardhat-ethers/-/hardhat-ethers-2.0.5.tgz#131b0da1b71680d5a01569f916ae878229d326d3"
   integrity sha512-A2gZAGB6kUvLx+kzM92HKuUF33F1FSe90L0TmkXkT2Hh0OKRpvWZURUSU2nghD2yC4DzfEZ3DftfeHGvZ2JTUw==
 
-"@nomiclabs/hardhat-etherscan@^2.1.8":
-  version "2.1.8"
-  resolved "https://registry.yarnpkg.com/@nomiclabs/hardhat-etherscan/-/hardhat-etherscan-2.1.8.tgz#e206275e96962cd15e5ba9148b44388bc922d8c2"
-  integrity sha512-0+rj0SsZotVOcTLyDOxnOc3Gulo8upo0rsw/h+gBPcmtj91YqYJNhdARHoBxOhhE8z+5IUQPx+Dii04lXT14PA==
+"@nomiclabs/hardhat-etherscan@^3.0.3":
+  version "3.0.3"
+  resolved "https://registry.yarnpkg.com/@nomiclabs/hardhat-etherscan/-/hardhat-etherscan-3.0.3.tgz#ca54a03351f3de41f9f5240e37bea9d64fa24e64"
+  integrity sha512-OfNtUKc/ZwzivmZnnpwWREfaYncXteKHskn3yDnz+fPBZ6wfM4GR+d5RwjREzYFWE+o5iR9ruXhWw/8fejWM9g==
   dependencies:
     "@ethersproject/abi" "^5.1.2"
     "@ethersproject/address" "^5.0.2"
     cbor "^5.0.2"
     debug "^4.1.1"
     fs-extra "^7.0.1"
-    node-fetch "^2.6.0"
     semver "^6.3.0"
+    undici "^4.14.1"
 
 "@nomiclabs/hardhat-solhint@^2.0.0":
   version "2.0.0"