SixArm/sixarm_ruby_hash_more

# Changes

* 2018-06-22 2.0.0 Update to Ruby 2.5, testing gems, etc.
* 2017-08-13 1.3.3 Update to Ruby 2.4, spdx licenses, rake test, etc.
* 2015-07-18 1.3.2 Improve quality assurance
* 2015-07-07 1.3.1 Update gemspec to use file manifest
* 2012-03-17 1.3.0 Upgrade for Ruby 1.9.3, minitest/spec, and improved docs