Tldextract

* Bugfixes
* Fix concurrent access to cache file when using tldextract in multiple threads ([146](https://github.com/john-kurkowski/tldextract/pull/146))
* Relocate version number, to avoid costly imports ([187](https://github.com/john-kurkowski/tldextract/pull/187))
* Catch `IndexError` caused by upstream punycode bug ([200](https://github.com/john-kurkowski/tldextract/pull/200))
* Drop support for EOL Python 3.4 ([186](https://github.com/john-kurkowski/tldextract/pull/186))
* Explain warning better

* Bugfixes
* Catch file not found
* Use pkgutil instead of pkg_resources ([163](https://github.com/john-kurkowski/tldextract/pull/163))
* Performance: avoid recomputes, a regex, and a partition
* Misc.
* Update LICENSE from GitHub template
* Fix warning about literal comparison
* Modernize testing ([177](https://github.com/john-kurkowski/tldextract/issues/177))
* Use the latest pylint that works in Python 2
* Appease pylint with the new rules
* Support Python 3.8-dev

* Bugfixes
* Ignore case on punycode prefix check ([133](https://github.com/john-kurkowski/tldextract/issues/133))
* Drop support for EOL Python 2.6 ([152](https://github.com/john-kurkowski/tldextract/issues/152))
* Improve sundry doc and README bits

* Features
* Add `cache_fetch_timeout` kwarg and `TLDEXTRACT_CACHE_TIMEOUT` env var ([139](https://github.com/john-kurkowski/tldextract/issues/139))
* Bugfixes
* Work around `pkg_resources` missing, again ([137](https://github.com/john-kurkowski/tldextract/issues/137))
* Always close sessions ([140](https://github.com/john-kurkowski/tldextract/issues/140))

* Features
* Add `fqdn` convenience property ([129](https://github.com/john-kurkowski/tldextract/issues/129))
* Add `ipv4` convenience property ([126](https://github.com/john-kurkowski/tldextract/issues/126))

* Bugfixes
* Switch to explicit Python version check ([124](https://github.com/john-kurkowski/tldextract/issues/124))
* Misc.
* Document public vs. private domains
* Document support for Python 3.6