Use pyreadline3 instead of pyreadline

[parejkoj]

I updated the pyreadline dependency, import, and readme links. I'm not sure how to test that this will pip-install with the correct dependency, though.

There's also some further discussion in the readme about bugs in the current pyreadline (e.g. issue 48); there aren't specific issue links to convert those to, and I don't know which, if any, of those bugs have been fixed in pyreadline3.

This should fix issues #36 and #37 .

[parejkoj]

It looks like pyreadline3 PR #9 might fix the color completions bug. If we can get that merged, we can remove that note from this readme.

[parejkoj]

@brgirgis @athrvvvv: what do you need in order to merge this?

[athrvvvv]

@parejkoj ohhh i got it. even though we install pyreadline3 via pip install pyreadline3 we have to import it as pyreadline.

[parejkoj]

@athrvvvv : I'm not sure about that. It certainly looks like pyreadline3 should be imported as exactly that. The thing I don't know how to do is test it.

[athrvvvv]

import it as pyreadline

[parejkoj]

The import is wrapped internally and it looks like what it is imported as doesn't matter, e.g., no need for import ... as ....

Unless you're saying the import has to be import pyreadline, but it doesn't look like that's correct for pyreadline3. I just tested a pip installl pyreadline3 and it is found via import pyreadline3.

[blueyed]

To get this merged CI should be green, which involves moving it to GitHub Actions (#46).

Then there might also a compat issue, given that "Version 3.4+ or pyreadline3 runs on Python 3.5+.".

[parejkoj]

@blueyed : I'll wait on a fix for #46 and rebase to it then.