fix: packages/demo/package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-REACTNATIVEWEBVIEW-1011954

packages/demo/package.json

@@ -11,7 +11,7 @@
     "postinstall": "expo-yarn-workspaces postinstall"
   },
   "dependencies": {
-    "expo": "^33.0.0",
+    "expo": "^34.0.1",
     "react": "16.8.3",
     "react-dom": "^16.8.6",
     "react-native": "https://github.com/expo/react-native/archive/sdk-33.0.0.tar.gz",

yarn.lock

@@ -7714,9 +7714,9 @@ inherits@2.0.3:
   integrity sha1-Yzwsg+PaQqUC9SRmAiSA9CCCYd4=
 
 ini@^1.3.2, ini@^1.3.4, ini@^1.3.5, ini@~1.3.0:
-  version "1.3.7"
+  version "1.3.5"
-  resolved "https://registry.yarnpkg.com/ini/-/ini-1.3.7.tgz#a09363e1911972ea16d7a8851005d84cf09a9a84"
+  resolved "https://registry.yarnpkg.com/ini/-/ini-1.3.5.tgz#eee25f56db1c9ec6085e0c22778083f596abf927"
-  integrity sha512-iKpRpXP+CrP2jyrxvg1kMUpXDyRUFDWurxbnVT1vQPx+Wz9uCYsMIqYuSBLV+PAaZG/d7kRLKRFc9oDMsH+mFQ==
+  integrity sha512-RZY5huIKCMRWDUqZlEi72f/lmXKMvuszcMBduliQ3nnWbx9X/ZBQO7DijMEYS9EhHBb2qacRUMtC7svLwe0lcw==
 
 init-package-json@^1.10.3:
   version "1.10.3"