Fix linter warnings and dependencies (#264)

* Fix minor linting errors

* Fix CLI getters linting errors

* Fix resolvers template in codegen

* Fix dependencies

packages/codegen/package.json

@@ -23,6 +23,7 @@
     "@graphql-tools/load-files": "^6.5.2",
     "@poanet/solidity-flattener": "https://github.com/vulcanize/solidity-flattener.git",
     "@solidity-parser/parser": "^0.13.2",
+    "ethers": "^5.4.4",
     "gql-generator": "https://github.com/vulcanize/gql-generator.git",
     "graphql": "^15.5.0",
     "graphql-compose": "^9.0.3",
@@ -36,7 +37,6 @@
     "yargs": "^17.1.1"
   },
   "devDependencies": {
-    "@openzeppelin/contracts": "^4.3.2",
     "@types/js-yaml": "^4.0.3",
     "@types/node": "^16.9.0",
     "@typescript-eslint/eslint-plugin": "^4.25.0",