stopword 3.1.1

v3.1.1 - Swapped Danish and Swedish with versions with better licenses

on Node.js NPM

• Removed CC BY-SA for Danish and Swedish with libraries that have MIT-license, so it's in line with the stopword-library.
• Updated Swedish test since one additional word was now defined as a stopword
• Updated 3rd-party.txt with the 3rd party license texts needed for the minified dist files.

Full Changelog: v3.0.1...v3.1.1