Plumpy

Bug fixes

- Dependencies: only require `aiocontextvars` for Python < 3.7 [[181]](https://github.com/aiidateam/plumpy/pull/181)

Changes

- Add support for Python 3.9 [[176]](https://github.com/aiidateam/plumpy/pull/176)
- Make application of `nest_asyncio` patch explicit [[179]](https://github.com/aiidateam/plumpy/pull/179)

Bug fixes

- `Port`: do not call validator if unspecified and port not required [[173]](https://github.com/aiidateam/plumpy/pull/173)

Changes

- Dependencies: relax the requirement on `aio-pika` to `aio-pika~=6.6`. [[171]](https://github.com/aiidateam/plumpy/pull/171)

Changes

- Drop `tornado` as a dependency and replace it fully by `asyncio` [[166]](https://github.com/aiidateam/plumpy/pull/166)

Changes

- Drop support for Python 2.7 [[151]](https://github.com/aiidateam/plumpy/pull/151)

Bug fixes

- `LoopCommunicator`: fix incorrect call through in `remove_broadcast_subscriber` [[156]](https://github.com/aiidateam/plumpy/pull/156)
- `PortNamespace`: do not add empty optional port namespaces to parsed inputs in the `pre_process` method [[143]](https://github.com/aiidateam/plumpy/pull/143)
- `PortNamespace`: do not set `dynamic=False` when `valid_type=None` [[146]](https://github.com/aiidateam/plumpy/pull/146)
- `PortNamespace`: set `dynamic=True` if `valid_type` in constructor [[145]](https://github.com/aiidateam/plumpy/pull/145)

Developers

- Migrate CI from Travis to Github Actions [[152]](https://github.com/aiidateam/plumpy/pull/152)

Features

- `Port`: add context argument to validator method [[141]](https://github.com/aiidateam/plumpy/pull/141)

Changes

- Remove unnecessary abstraction layer `ValueSpec` [[141]](https://github.com/aiidateam/plumpy/pull/141)