Regenerate gemspec for version 2.3.1

ruby-units.gemspec

@@ -2,20 +2,19 @@
 # DO NOT EDIT THIS FILE DIRECTLY
 # Instead, edit Jeweler::Tasks in Rakefile, and run 'rake gemspec'
 # -*- encoding: utf-8 -*-
-# stub: ruby-units 2.3.0 ruby lib
+# stub: ruby-units 2.3.1 ruby lib
 
 Gem::Specification.new do |s|
   s.name = "ruby-units".freeze
-  s.version = "2.3.0"
+  s.version = "2.3.1"
 
   s.required_rubygems_version = Gem::Requirement.new(">= 0".freeze) if s.respond_to? :required_rubygems_version=
   s.require_paths = ["lib".freeze]
   s.authors = ["Kevin Olbrich, Ph.D.".freeze]
-  s.date = "2018-03-06"
+  s.date = "2018-09-26"
   s.description = "Provides classes and methods to perform unit math and conversions".freeze
   s.email = ["[email protected]".freeze]
   s.extra_rdoc_files = [
-    "CHANGELOG.txt",
     "LICENSE.txt",
     "README.md"
   ]
@@ -46,7 +45,7 @@ Gem::Specification.new do |s|
   ]
   s.homepage = "https://github.com/olbrich/ruby-units".freeze
   s.licenses = ["MIT".freeze]
-  s.rubygems_version = "2.7.4".freeze
+  s.rubygems_version = "2.6.14".freeze
   s.summary = "A class that performs unit conversions and unit math".freeze
 
   if s.respond_to? :specification_version then