CodeMirror 5.65.18

Website:
https://codemirror.net/5/

Source repository:
https://github.com/codemirror/codemirror

Vendored files:
- codemirror.css
- codemirror.js
- addon/search/searchcursor.js as searchcursor.js
- addon/mode/simple.js as simple.js
- mode/yaml/yaml.js as yaml.js
- LICENSE

The JavaScript/CSS files were downloaded from cdnjs for version 5.65.18:
https://cdnjs.com/libraries/codemirror/5.65.18

codemirror.js is minified locally from the upstream CodeMirror 5.65.18
codemirror.js using terser. The MIT license is kept in LICENSE.
