Add @nomiclabs/*/src to forbidden imports

Co-authored-by: Patricio Palladino <email@patriciopalladino.com>

config/eslint/eslintrc.js

@@ -207,7 +207,7 @@ module.exports = {
     ],
     "use-isnan": "error",
     "no-restricted-imports": ["error", {
-      patterns: ["hardhat/src"]
+      patterns: ["hardhat/src", "@nomiclabs/*/src"]
     }],
   },
 };