fix removals in DataSyncService

#63 (comment)

Author: WalterNorthwoods

projects/gojs-angular/package.json

@@ -1,6 +1,6 @@
 {
   "name": "gojs-angular",
-  "version": "2.0.6",
+  "version": "2.0.7",
   "peerDependencies": {
     "@angular/common": ">=11.0.0",
     "@angular/core": ">=11.0.0"

projects/gojs-angular/src/lib/data-sync.service.ts

@@ -52,7 +52,8 @@ export class DataSyncService {
 
       // account for removed node data
       if (changes.removedNodeKeys) {
-        const removals = changes.removedNodeKeys.map(key => keyIdxMap.get(key)).sort();
+        const removals = changes.removedNodeKeys.map(key => keyIdxMap.get(key)) as number[];
+        removals.sort((a, b) => a - b);
         for (let i = removals.length - 1; i >= 0; i--) {
           draft.splice(removals[i], 1);
         }
@@ -109,7 +110,8 @@ export class DataSyncService {
 
       // account for removed link data
       if (changes.removedLinkKeys) {
-        const removals = changes.removedLinkKeys.map(key => keyIdxMap.get(key)).sort();
+        const removals = changes.removedLinkKeys.map(key => keyIdxMap.get(key)) as number[];
+        removals.sort((a, b) => a - b);
         for (let i = removals.length - 1; i >= 0; i--) {
           draft.splice(removals[i], 1);
         }