Regenerate gemspec for version 0.4.0

VERSION

@@ -1 +1 @@
-0.3.0
+0.4.0

iso.gemspec

@@ -2,16 +2,16 @@
 # DO NOT EDIT THIS FILE DIRECTLY
 # Instead, edit Jeweler::Tasks in Rakefile, and run 'rake gemspec'
 # -*- encoding: utf-8 -*-
-# stub: iso 0.3.0 ruby lib
+# stub: iso 0.4.0 ruby lib
 
 Gem::Specification.new do |s|
   s.name = "iso".freeze
-  s.version = "0.3.0"
+  s.version = "0.4.0"
 
   s.required_rubygems_version = Gem::Requirement.new(">= 0".freeze) if s.respond_to? :required_rubygems_version=
   s.require_paths = ["lib".freeze]
   s.authors = ["Christopher Dell".freeze, "Thibault Dalban".freeze]
-  s.date = "2019-12-04"
+  s.date = "2020-11-17"
   s.description = "A subset of the ISO spec implemented in ruby".freeze
   s.email = "[email protected]".freeze
   s.extra_rdoc_files = [
@@ -21,6 +21,7 @@ Gem::Specification.new do |s|
   s.files = [
     ".document",
     ".rspec",
+    ".travis.yml",
     "Gemfile",
     "Gemfile.lock",
     "Guardfile",
@@ -50,7 +51,7 @@ Gem::Specification.new do |s|
   ]
   s.homepage = "http://github.com/tigrish/iso".freeze
   s.licenses = ["MIT".freeze]
-  s.rubygems_version = "3.0.6".freeze
+  s.rubygems_version = "3.0.3".freeze
   s.summary = "A ruby implementation of ISO".freeze
 
   if s.respond_to? :specification_version then