Fairseq breaks AbLang installation with python > 3.8

[ElArkk]

See issue here: facebookresearch/fairseq#3535

Using Python 3.8.12 I was able to install ablang via pip, but Python 3.9 and 3.10 leads to the error described in the issue linked above.

[TobiasHeOl]

@ElArkk Thanks for letting us know! We will most likely wait until fairseq fixes the issue, so please use <3.9 for now.

[sdvillal]

For conda users, there are a few open PRs aiming at fixing this. In particular this one seems to work.

Until they get accepted, a workaround is to use sdvillal::fairseq as a dependency in your environment (linux and macos only).

[TobiasHeOl]

Sorry for the long wait! fairseq keeps introducing different dependency issues. To resolve this, we have decided to extract the code from fairseq that we use, allowing us not to install fairseq anymore 8f901e9.