fix: eslint config and errors

packages/eslint-config-custom/index.js

@@ -16,6 +16,7 @@ module.exports = {
     },
   },
   rules: {
+    "no-useless-escape": "off",
     "prefer-const": "error",
     "no-irregular-whitespace": "error",
     "no-trailing-spaces": "error",
@@ -36,6 +37,7 @@ module.exports = {
       {
         selector: ["function", "variable"],
         format: ["camelCase", "snake_case", "UPPER_CASE", "PascalCase"],
+        leadingUnderscore: "allow",
       },
     ],
   },