updates checkCode to new framework

tools/fieldRename.ts

@@ -87,8 +87,8 @@ class RenameFields implements ITool {
     this.block = block;
   }
 
-  help(standalone = false) {
-    cliAlert(
+  async help(standalone = false) {
+    await cliAlert(
       "Usage: rename-fields <pdfPath> <pattern> <change>\n",
       standalone ? undefined : this.block,
     );