fix: set the never option for one-var

Author: aminya

src/official-eslint-rules.js

@@ -111,5 +111,5 @@ exports.eslintRulesExtra = {
   "prefer-spread": "error", // require spread operators instead of `.apply()`
   "prefer-template": "error", // require template literals instead of string concatenation
   "symbol-description": "error", // require symbol descriptions
-  "one-var": "error", // enforces variables to be declared either separately
+  "one-var": ["error", "never"], // enforces variables to be declared either separately
 }