New major release 2.0.0

Main change is that we are dropping support for Ruby versions below
2.1.x. Have adjusted some of the bootstraps for older generation distros
to minimise compatability headache where possible, but ultimately not
all of them will be able to support the new generation Pupistry.

lib/pupistry/version.rb

@@ -1,3 +1,3 @@
 module Pupistry
-  VERSION = '1.5.0'
+  VERSION = '2.0.0'
 end

pupistry.gemspec

@@ -6,7 +6,7 @@ require 'pupistry/version'
 Gem::Specification.new do |spec|
   spec.name        = 'pupistry'
   spec.version     = Pupistry::VERSION # See lib/pupistry/version.rb to change version
-  spec.date        = '2016-09-18'
+  spec.date        = '2018-05-29'
   spec.summary     = 'A workflow tool for Puppet Masterless Deployments'
   spec.description = 'Provides security, reliability and consistency to Puppet masterless environments' # rubocop:disable Metrics/LineLength
   spec.authors     = ['Jethro Carr']