Fixes a deadlock issue when the `incoming` channel is closed first. The problem was that the `send_out_buf` was set to `Fuse::terminated` without breaking the loop, so on the next loop iteration both futures were already terminated.

This causes the `send_out_buf` future to completely starve.

We now report other event types as well. Right now, the only other event type is `Stop`, but we can extend this in the future.

Bumps [tokio](https://github.com/tokio-rs/tokio) from 1.23.1 to 1.24.2.
- [Release notes](https://github.com/tokio-rs/tokio/releases)
- [Commits](https://github.com/tokio-rs/tokio/commits)

---
updated-dependencies:
- dependency-name: tokio
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

We cannot wait until all operators of the runtime node are finished because operators might be subscribed to other operators.

To alievate the unbounded memory growth, we're replacing variable dereferencing
with scoped `GILPool` as described in the pyo3 documentation recently updated. See:
https://github.com/PyO3/pyo3/pull/2864

This commit fix the memory leak happening in the dora API operator. This
is seemingly due to pyo3 leaking memory on object created in Rust.
Using standard `drop` did not drop the memory on the `PyBytes` included in
the `PyDict`.

See: https://github.com/PyO3/pyo3/issues/1801

Fixes https://github.com/dora-rs/dora/issues/163

Bumps [tokio](https://github.com/tokio-rs/tokio) from 1.21.2 to 1.23.1.
- [Release notes](https://github.com/tokio-rs/tokio/releases)
- [Commits](https://github.com/tokio-rs/tokio/compare/tokio-1.21.2...tokio-1.23.1)

---
updated-dependencies:
- dependency-name: tokio
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

This way, we don't need to update the version manually in all sub-crates on every release.

By making the stopping loop the first loop, we can avoid using `pyo3/allow_threads`, which
seems buggy.

This commit is an initial draft at fixing #147. The error is due to the
fact that pyo3 has linked the libpython from the compilation and not
trying to use libpython that is available in `LD_LIBRARY_PATH`.

The current only solution to disable the linking is to use the `extension-module` flag.
This requires to make the python `runtime-node` packaged in a python library.
The python `runtime-node` should also be fully compatible with the other operators in case we want hybrid runtime.

The issue that i'm facing is that. Due to the packaging, I have to deal with the `GIL` that is present from the start of
`dora-runtime` node. This however makes the process single threaded wich is impossible.

So, I have to disable it, but when I do, I have a race condition:
```bash
Exception ignored in: <module 'threading' from '/usr/lib/python3.8/threading.py'>
Traceback (most recent call last):
  File "/usr/lib/python3.8/threading.py", line 1373, in _shutdown
    assert tlock.locked()
AssertionError:
```
The issue is the same as https://github.com/PyO3/pyo3/issues/1274

To fix this issue, I'm going to look again at the different step to make this work.

But this is my current investigation.