type fix

Author: willwade

src/processors/gridset/saveMutations.ts

@@ -44,7 +44,7 @@ export class GridsetSaveHandler {
     parser: any,
     gridBuilder: any,
     createBasicGridXml: (page: AACPage) => string
-  ): Promise<void> {
+  ): void {
     for (const page of Object.values(tree.pages)) {
       // Skip pages with no mutations
       if (page.pendingMutations.length === 0) {

src/processors/gridsetProcessor.ts

@@ -2547,7 +2547,7 @@ class GridsetProcessor extends BaseProcessor {
         suppressBooleanAttributes: false,
       });
 
-      await GridsetSaveHandler.saveWithMutations(
+      GridsetSaveHandler.saveWithMutations(
         tree,
         originalZip,
         outputZip,