A call to `sync()` freezes the app with unavailable sync URL

[Pekka Enberg]

The following just freezes the app so badly that even Ctrl-C doesn't work if there's nothing listening to the sync_url:

import libsql_experimental

con = libsql_experimental.connect("hello.db", sync_url="http://localhost:8080", auth_token="")

con.sync()