fix: package.json to reduce vulnerabilities (#7)

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-SEMVER-3247795

Co-authored-by: snyk-bot <snyk-bot@snyk.io>

package.json

@@ -79,12 +79,12 @@
         "coveralls": "^3.0.0",
         "ganache-cli": "6.12.2",
         "husky": "^8.0.3",
-        "lerna": "^3.0.0-beta.25",
+        "lerna": "^4.0.0",
         "lint-staged": "^13.1.0",
         "npm-run-all": "^4.1.2",
         "prettier": "2.7.1",
         "prettier-plugin-solidity": "^1.0.0",
-        "solhint": "^3.3.7",
+        "solhint": "^3.4.0",
         "solhint-plugin-prettier": "^0.0.5",
         "source-map-support": "^0.5.6",
         "typescript": "4.6.3",