fix: packages/app-mobile/package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-ELLIPTIC-8187303
- https://snyk.io/vuln/SNYK-JS-DOMPURIFY-8184974

packages/app-mobile/package.json

@@ -31,7 +31,7 @@
     "@types/react-native-sqlite-storage": "^6.0.5",
     "@types/react-native-vector-icons": "^6.4.18",
     "@types/socket.io-client": "3.0.0",
-    "@xilinota/lib": "^2.15.0",
+    "@xilinota/lib": "^2.13.0",
     "@xilinota/react-native-alarm-notification": "^2.13.1",
     "@xilinota/react-native-saf-x": "^2.13.1",
     "@xilinota/utils": "^2.13.1",