This commit is a port of Merge Request !40 to the release branch
of declearn v2.0.

See commit ae6ec5cd on the develop
branch as well as the merge request !40 for additional details.

This removal was supposed to be part of a past commit
(cd1d0cb1) but had in
fact not been properly finished.

With this commit, install declearn no longer results
in the automatic installation of gRPC and websockets,
which are properly relegated to being optional, user-
triggered-installation, dependencies.

This commit was cherry-picked into r2.0.
Original commit: 3c82f5ce

ANDREY Paul authored 2 years ago and ANDREY Paul committed 2 years ago

* Set up "develop" as principal (~main) branch where to push new features,
  hence acting as a nightly stable version.
* Introduce "rX.Y" release branches, that need protection and CI/CD.

This commit was cherry-picked into r2.0 from main.
Original commit: 0585e4ca

Warn about frozen weights use in `TensorflowModel` and `TorchModel`.

See merge request declearn2!27

Fix `TensorflowModel` gradients' labeling.

Closes #14

See merge request declearn2!26

Release version 2.0

See merge request declearn2!23

Adding unit tests for vectors

See merge request declearn2!22

Support for Python 3.7 had been envisioned and partially documented,
but had not been tested for a while. As it turns out, some of the
`typing` functionalities the generic TOML-parsing system relies upon
were only introduced in Python 3.8. Since rewriting this code would
be tedious without these utils, and since official support for py37
ends in less than six months, it was decided not to support it for
declearn.