Support isort 5

[gbroques]

isort 5 is released.

isort 5.0.0 is the first major release of isort in over five years and the first significant refactoring of isort since it was conceived more than ten years ago. It's also the firisst version to require Python 3 (Python 3.6+ at that!) to run - though it can still be run on source files from any version of Python. This does mean that there may be some pain with the upgrade process, but we believe the improvements will be well worth it.

However,

flake8-isort 3.0.1 requires isort[pyproject]<5,>=4.3.5

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EDIT: I see this is actively being worked on in fee5f69 and 6b103a0.

Looking forward to 4.0.0! 🥳

I'll try the first alpha release 4.0.0a0.

Related #88 #92.

[gbroques]

The alpha release 4.0.0a0 seems to work at a glance.

Using flake8==3.8.3 and isort==5.3.2 with it.

I'll close this issue. Thank you again!!