CodeMirror 3.16 for Joomla 2.5
Codemirror 3.18
passes phpcs
CodeMirror 3.19
Standardize param names to camelCase.
CodeMirror 3.20
The way to get syntax is different from 2.5x to 3.2
Codemirror 3.21
Codemirror 3.22 - see codemirror.net for release notes