Update VectorGraphics to 2.0.0-preview.21

Author: ivan-trackman

package.json

@@ -6,7 +6,7 @@
   "unity": "2021.3",
   "dependencies": {
     "org.nuget.newtonsoft.json": "13.0.1",
-    "com.unity.vectorgraphics": "2.0.0-preview.20",
+    "com.unity.vectorgraphics": "2.0.0-preview.21",
     "com.trackman.asyncawaitutil": "1.0.6",
     "com.trackman.commonutils": "3.7.0"
   },