TBR: bump extn version.

Change-Id: I3134f619d568b2f11950a8b997330aaeffa510f2
diff --git a/extension/manifest.json b/extension/manifest.json
index 9de0269..543395c 100644
--- a/extension/manifest.json
+++ b/extension/manifest.json
@@ -1,6 +1,6 @@
 {
   "name": "Vanadium Extension",
-  "version": "0.1.15",
+  "version": "0.1.16",
   "description": "Access and create Vanadium services from JavaScript.",
   "manifest_version": 2,
   "icons": {