Merge pull request #512 from github/pages-ruby-24

Update CI & rubocop to use ruby 2.4, catching up to GitHub Pages

.rubocop.yml

@@ -1,5 +1,5 @@
 AllCops:
-  TargetRubyVersion: 2.3
+  TargetRubyVersion: 2.4
   Exclude:
     - _site/**/*
     - vendor/**/*

.travis.yml

@@ -5,7 +5,7 @@ script: "./script/cibuild"
 #environment
 language: ruby
 rvm:
-  - 2.3.3
+  - 2.4.0
 
 branches:
   only:

_licenses/eupl-1.1.txt

@@ -2,7 +2,7 @@
 title: European Union Public License 1.1
 spdx-id: EUPL-1.1
 redirect_from: /licenses/eupl-v1.1/
-source: https://joinup.ec.europa.eu/community/eupl/og_page/european-union-public-licence-eupl-v11
+source: https://joinup.ec.europa.eu/community/eupl/og_page/eupl-text-11-12
 
 description: The “European Union Public Licence” (EUPL) is a copyleft free/open source software license created on the initiative of and approved by the European Commission in 22 official languages of the European Union.