Log Message:
www/ruby-net-http-persistent: update to 3.1.0

Update ruby-net-http-persistent to 3.1.0.

=== 3.1.0 2019-07-24

New features:
* Support ruby 2.6 Net::HTTP#write_timeout=.  Pull request #99 by Víctor
  Roldán Betancort.
* Support setting TLS min/max version.  Pull request #94 by Bart.

Bug fixes:
* Reduce potential for memory leak through Hash default proc bindings.  Pull
  request #64 by Dominic Metzger.
* Test proxy auto detection from no_proxy in ENV.  Pull request #60 by
  HINOHARA Hiroshi.
* Add missing timestamp for 3.0 release.  Pull request #78 by Joe Van Dyk.
* Support IPv6 URLs in proxy checks.  Pull request #82 by Nicolás Sanguinetti.
* Use Net::HTTPGenericRequest#method to check idempotence for improved
  compatibility.  Pull request #83 by Fotos Georgiadis.
* Run net-http-pipeline tests in travis.  Pull request #86 by T.J. Schuck.
* Correct +no_proxy+ support to override Net::HTTP proxy fallback.  Pull
  request #88 by Jared Kauppila.
* Mitigate memory leak when combined with faraday.  Pull request #105 by Yohei
  Kitamura.
* Set default connection pool size for Windows.  Pull request #90 by Jared
  Kauppila.
* Fix missing +name:+ argument in documentation.  Pull requests #85 by T.J.
  Schuck, #84 by James White.
* Fix memory leak from connection pooling.  Pull request #97 by Aaron
  Patterson.
* Update tests for minitest assert_equal deprecation.  Pull request #92 by
  Olle Jonsson.
* Fix typo in Net::HTTP::Persistent#pipeline.  Pull request #91 by Kazuma
  Furuhashi.

Other:
* Added bundler hoe plugin.  Pull request #103 by Michael Grosser.
* Updated ruby versions in Travis CI.  Pull request #93 by Olle Jonsson.  Pull
  request #103 by Michael Grosser.