fix: ensure default pagination keywords are used when no keywords are provided

Author: fml09

packages/openapi-ts/src/ir/pagination.ts

@@ -8,11 +8,14 @@ export const DEFAULT_PAGINATION_KEYWORDS = [
   'offset',
   'page',
   'start',
-];
+] as const;
 
 export function getPaginationKeywordsRegExp({
   keywords = DEFAULT_PAGINATION_KEYWORDS,
 }: Config['input']['pagination'] = {}): RegExp {
+  if (keywords.length === 0) {
+    keywords = DEFAULT_PAGINATION_KEYWORDS;
+  }
   const pattern = `^(${keywords.join('|')})$`;
   return new RegExp(pattern);
 }