Update expo to use uilib snapshot version

Author: ethanshar

expoDemo/package.json

@@ -22,7 +22,7 @@
     "react-native-safe-area-context": "3.2.0",
     "react-native-screens": "~3.4.0",
     "react-native-svg": "12.1.1",
-    "react-native-ui-lib": "^6.1.2",
+    "react-native-ui-lib": "snapshot",
     "react-native-web": "~0.13.12",
     "unicorn-demo-app": "snapshot"
   },