bug fix in JSON serialization

src/lib/Utils.js

@@ -60,6 +60,20 @@ export default {
         .sort((a, b) => a.sort - b.sort).map(({ value }) => value)
     },
 
+    deepMerge(target, source, transformFn) {
+        Object.entries(source).forEach(([key, value]) => {
+            if (transformFn){
+                value = transformFn(key, value)
+            }
+            if (value && typeof value === 'object' && !Array.isArray(value)) {
+                this.deepMerge(target[key] = target[key] || {}, value, transformFn);
+                return;
+            }
+            target[key] = value;
+        });
+        return target;
+    },
+
     drawOnCanvas(svg, width, height){
         return new Promise((resolve, reject)=>{
             let url = URL.createObjectURL(new Blob([svg],{ type:"image/svg+xml;charset=utf-8" }));