build(icon): minimum tokens version of latest beta

The latest tokens contains newly added medium and large custom vars.
This will need to change to >=13.1.0 of tokens on release.

Author: jawinn

components/icon/package.json

@@ -15,7 +15,7 @@
   },
   "main": "dist/index.css",
   "peerDependencies": {
-    "@spectrum-css/tokens": ">=11.4"
+    "@spectrum-css/tokens": ">=13.1.0-beta.1"
   },
   "publishConfig": {
     "access": "public"