Build for Python 3.8

[Zaharid]

I have added the external recipes
https://github.com/Zaharid/conda-recipes/
to use Github actions and build for python 3.8 and 3.9

and have updated reportengine to be python and os independet and also use github actions

https://github.com/NNPDF/reportengine/

with that we should be able to build for python 3.8. Of course for some reason it only works with new versions of conda build so this #915 needs to be addressed.

Python 3.9 should be trivial except that you-know-which-package is still missing support for it.

[siranipour]

Will this have affected anything yet? Just wondering if the reason some of my PRs fail here but not locally could be because of this

[Zaharid]

There is an unrelated general failure due to hypothesis deciding you have to touch some test. Would be nice to have a fix for that.

[Zaharid]

I think the mac conflict boils down to https://anaconda.org/anaconda/tensorflow-eigen being an old package for mac and maybe something else but it is genuinely impossible to understand what the problem is looking at the conda error. I would have thought it would be better at reporting errors than this :(.

Anyhow could someone try

~ $ conda create -p /tmp/testenv python=3.8 tensorflow-eigen

on mac?

[wilsonmr]

As you say, that package doesn't appear to exist for 3.8.

$ conda create -p /tmp/testenv python=3.8 tensorflow-eigen
Collecting package metadata (current_repodata.json): done
Solving environment: failed with repodata from current_repodata.json, will retry with next repodata source.
Collecting package metadata (repodata.json): done
Solving environment: | 
Found conflicts! Looking for incompatible packages.
This can take several minutes.  Press CTRL-C to abort.
failed                                                                          

UnsatisfiableError: The following specifications were found to be incompatible with each other:

Output in format: Requested package -> Available versions

Package python conflicts for:
tensorflow-eigen -> tensorflow==2.0.0 -> python[version='2.7.*|3.7.*|3.6.*|>=3.6,<3.7.0a0|>=3.7,<3.8.0a0|>=2.7,<2.8.0a0|3.5.*|>=3.5,<3.6.0a0']
python=3.8

[Zaharid]

This does indeed work now. I have to clean it up a bit.