Log Message:
Update ruby-net-http-persistent to 3.0.0.

=== 3.0

Breaking changes:

* No longer supports ruby 2.0 and earlier
* Net::HTTP::Persistent::new now uses keyword arguments for +name+ and
  +proxy+.
* Removed #max_age, use #expired?

New features:

* Uses connection_pool to manage all connections for a Net::HTTP::Persistent
  instance.

Bug fixes:

* Add missing SSL options ca_path, ciphers, ssl_timeout, verify_depth.
  Issue #63 by Johnneylee Jack Rollins.