fix: evm-base-contracts/package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-BASEX-10118294

Author: snyk-bot

evm-base-contracts/package.json

@@ -31,7 +31,7 @@
     "solhint": "^1.2.1",
     "solidity-coverage": "^0.5.11",
     "truffle": "4.1.13",
-    "web3": "^1.8.0",
+    "web3": "^4.0.1",
     "yargs": "^12.0.2"
   }
 }