[BUG] Examples do not compile

[marolbrich]

Describe the bug
E.g. example/task_manager_demo:

To Reproduce

• "cd examples/task_manager_demo"
• "trunk serve"
• Many errors, starting with "This wasm target is unsupported by mio. If using Tokio, disable the net feature."

Expected behavior
That it compiles.

Actual behavior
Compiler errors occur.

Environment:

• OS: Linux lubuntu
• Rust Version: 1.90.0
• Leptos Version: 0.8.4
• leptos-sync-core Version: 0.8.0
• trunk Version: 0.21.14

Additional context
I guess, the feature flags are not set correctly when distinguishing between wasm target and server target.

[petehanssens]

Thanks @marolbrich , will take a look and respond hopefully with a fix