Update dependency svelte to v4.2.20

Author: renovate[bot]

libraries/svelte/package.json

@@ -21,7 +21,7 @@
     "webpack": "5.101.0"
   },
   "dependencies": {
-    "svelte": "4.2.19"
+    "svelte": "4.2.20"
   },
   "wireit": {
     "test": {