dev-python/lz4: version 2.1.6 bump

[arthurzam]

Bumped to newer version 2.1.6
Updated this new ebuild to EAPI=7
Added app-arch/lz4 as a runtime dependency and dev-python/pkgconfig as a build dependency.
Added support for Python3.7

[gentoo-bot]

Copyright policy change

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Pull Request assignment

Submitter: @arthurzam
Areas affected: ebuilds
Packages affected: dev-python/lz4

dev-python/lz4: @prometheanfire, @gentoo/python

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[arthurzam]

Well, I discovered a gentoo bug about the dependency on app-arch/lz4
Closes: https://bugs.gentoo.org/663570

[juippis]

The error is caused because one of the deps (dev-python/pkgconfig) doesn't have support for python3.4. So it seems like you need to drop support for python3.4 with this bump, as well. I personally think it's fine since Gentoo is ~probably stopping to support python3.4 soon anyway and 3.6 should be default for anyone already.

EDIT: also you should check your contribution with repoman before committing, it would have told you about it ;)

[arthurzam]

@juippis Thank you - will learn to use repoman.
Removed Python3.4 support as you suggested, also found about not supported ~arm in dev-python/pkgconfig

[gentoo-repo-qa-bot]

Pull request CI report

Report generated at: 2019-03-10 11:20 UTC
Newest commit scanned: f976532
Status: ✅ good

Issues already there before the PR (double-check them):
https://qa-reports.gentoo.org/output/gentoo-ci/e40e99f/output.html#dev-python/cheroot
https://qa-reports.gentoo.org/output/gentoo-ci/e40e99f/output.html#www-apps/radicale