Panic on sending heartbeat after build channels

[vigdail]

The problem

If channels are setup, it is no longer possible to send regular packets. Since the send method uses the sender which has been moved when building channels, it causes panic trying to unwrap None.
Due to this bug we can not use built-in heartbeat feature along with channels.

Steps to reproduce

1. Create bevy project
2. Add NetworkingPlugin with auto_heartbeat_ms: Some(1000)
3. Setup message channels
4. Run server
5. Connect client to server

Possible solution

Create separate senders for packets and messages.

Backtrace

thread 'main' panicked at 'called `Option::unwrap()` on a `None` value', /home/vigdail/.cargo/registry/src/github.com-1ecc6299db9ec823/bevy_networking_turbulence-0.3.3/src/transport.rs:282:14
stack backtrace:
   0: rust_begin_unwind
             at /rustc/9bc8c42bb2f19e745a63f3445f1ac248fb015e53/library/std/src/panicking.rs:493:5
   1: core::panicking::panic_fmt
             at /rustc/9bc8c42bb2f19e745a63f3445f1ac248fb015e53/library/core/src/panicking.rs:92:14
   2: core::panicking::panic
             at /rustc/9bc8c42bb2f19e745a63f3445f1ac248fb015e53/library/core/src/panicking.rs:50:5
   3: core::option::Option<T>::unwrap
             at /home/vigdail/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/option.rs:386:21
   4: <bevy_networking_turbulence::transport::ClientConnection as bevy_networking_turbulence::transport::Connection>::send
             at /home/vigdail/.cargo/registry/src/github.com-1ecc6299db9ec823/bevy_networking_turbulence-0.3.3/src/transport.rs:280:9
   5: bevy_networking_turbulence::NetworkResource::send
             at /home/vigdail/.cargo/registry/src/github.com-1ecc6299db9ec823/bevy_networking_turbulence-0.3.3/src/lib.rs:379:33
   6: bevy_networking_turbulence::heartbeats_and_timeouts
             at /home/vigdail/.cargo/registry/src/github.com-1ecc6299db9ec823/bevy_networking_turbulence-0.3.3/src/lib.rs:473:9
   7: core::ops::function::Fn::call
             at /home/vigdail/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ops/function.rs:70:5
   8: core::ops::function::impls::<impl core::ops::function::FnMut<A> for &F>::call_mut
             at /home/vigdail/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ops/function.rs:247:13
   9: <Func as bevy_ecs::system::into_system::SystemParamFunction<(),Out,(F0,F1),()>>::run
             at /home/vigdail/.cargo/registry/src/github.com-1ecc6299db9ec823/bevy_ecs-0.5.0/src/system/into_system.rs:207:21
  10: <bevy_ecs::system::into_system::FunctionSystem<In,Out,Param,Marker,F> as bevy_ecs::system::system::System>::run_unsafe
             at /home/vigdail/.cargo/registry/src/github.com-1ecc6299db9ec823/bevy_ecs-0.5.0/src/system/into_system.rs:147:19
  11: bevy_ecs::schedule::executor_parallel::ParallelExecutor::prepare_systems::{{closure}}
             at /home/vigdail/.cargo/registry/src/github.com-1ecc6299db9ec823/bevy_ecs-0.5.0/src/schedule/executor_parallel.rs:200:30
  12: <core::future::from_generator::GenFuture<T> as core::future::future::Future>::poll
             at /home/vigdail/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/future/mod.rs:80:19
  13: async_executor::Executor::spawn::{{closure}}
             at /home/vigdail/.cargo/registry/src/github.com-1ecc6299db9ec823/async-executor-1.4.1/src/lib.rs:144:13
  14: <core::future::from_generator::GenFuture<T> as core::future::future::Future>::poll
             at /home/vigdail/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/future/mod.rs:80:19
  15: async_task::raw::RawTask<F,T,S>::run
             at /home/vigdail/.cargo/registry/src/github.com-1ecc6299db9ec823/async-task-4.0.3/src/raw.rs:489:20
  16: async_executor::Executor::try_tick
             at /home/vigdail/.cargo/registry/src/github.com-1ecc6299db9ec823/async-executor-1.4.1/src/lib.rs:181:17
  17: bevy_tasks::task_pool::TaskPool::scope::{{closure}}
             at /home/vigdail/.cargo/registry/src/github.com-1ecc6299db9ec823/bevy_tasks-0.5.0/src/task_pool.rs:222:21
  18: std::thread::local::LocalKey<T>::try_with
             at /home/vigdail/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/thread/local.rs:272:16
  19: std::thread::local::LocalKey<T>::with
             at /home/vigdail/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std/src/thread/local.rs:248:9
  20: bevy_tasks::task_pool::TaskPool::scope
             at /home/vigdail/.cargo/registry/src/github.com-1ecc6299db9ec823/bevy_tasks-0.5.0/src/task_pool.rs:169:9
...

[therocode]

I am also encountering this one.