Add option to activate fuzzy completions in Jedi

[benmezger]

This adds fuzzy support to Jedi as requested by #718. Since fuzzy is only enabled in 0.15.2 (see https://github.com/davidhalter/jedi/blob/master/CHANGELOG.rst#0152-2019-12-20), this PR also update's Jedi's requirements.

Fixes #718

[palantirtech]

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[ccordoba12]

this PR also update's Jedi's requirements.

Please don't do that. Instead, please make things work for older Jedi versions as well.

[benmezger]

@ccordoba12 I believe using LooseVersion should do the job, but let me know if there is anymore improvements or if I missed anything.

[davidhalter]

Please don't do that. Instead, please make things work for older Jedi versions as well.

@ccordoba12 Just out of interest, why do you want to support older versions of Jedi? IMO that's just a waste of resources, since you could force users to install a new one :).

[ccordoba12]

Just out of interest, why do you want to support older versions of Jedi?

Because some Jedi versions (e.g. 0.15.0 and 0.15.1) broke completion for scientific Python libraries, and we had to do some ugly workarounds to support older versions that still work with them.

I really don't want my comment to sound as a criticism on your work as a maintainer (I'm also a maintainer, so I understand how hard that job is), but I don't want to be hit by that kind of bugs for now.

By the way, we're planning to migrate soon to use Jedi 0.16, so this is just a temporary measure.

[davidhalter]

Because some Jedi versions (e.g. 0.15.0 and 0.15.1) broke completion for scientific Python libraries, and we had to do some ugly workarounds to support older versions that still work with them.

While I'm sorry that this happened, in the future you should probably just not upgrade and try to open issues in Jedi. Jedi is probably soon going to be feature complete and 1.0 is coming.

[ccordoba12]

@benmezger, please merge this PR with master and fix the merge conflicts.

[benmezger]

@ccordoba12 ✅

[ccordoba12]

Thanks for this @benmezger! And thanks for your patience too.