find actual minimal requirements

[Borda]

What does this PR do?

Find the minimal requirements that let tests pass. In follow-up PR we shall recover back compatibility with PyTorch 1.1 and 1.2

PR review

Anyone in the community is free to review the PR once the tests have passed.
If we didn't discuss your PR in Github issues there's a high chance it will not be merged.

[Borda]

@williamFalcon I think that this is an important step to let all other work on this project smoothly going... and then in parallel we can recover older versions...

[williamFalcon]

@Borda sorry we can't do this. We need to recover 1.1 and 1.2 as the most immediate priority

[Borda]

I understand, I just propose to do it step by step, not in a single large effort...
so the next one is lower to 1.2 with all test passing and then 1.1...

[williamFalcon]

ok that makes sense. Can we prioritize that for now? The next release will need to be pushed back if we can't support 1.1 or 1.2.

But still, I don't want to auto-upgrade these packages for people. So let's keep it as is and submit the fixes one by one, otherwise people working on master are going to get a surprise when their environments upgrade automatically.

So, let' close this PR and submit new ones for 1.2 and 1.1 support.

[Borda]

ok that makes sense.

@williamFalcon well, I thought that you merge it, but instead, you closed it 😞

Can we prioritize that for now? The next release will need to be pushed back if we can't support 1.1 or 1.2.

just working on it...