fix(deps): update dependency codemirror to v5.38.0

This Pull Request updates dependency codemirror from v5.37.0 to v5.38.0

Note: This PR was created on a configured schedule ("every weekend" in timezone Europe/Paris) and will not receive updates outside those times.

Release Notes

### [`v5.38.0`](https://github.com/codemirror/CodeMirror/blob/master/CHANGELOG.md#5380-2018-05-21) [Compare Source](https://github.com/codemirror/CodeMirror/compare/5.37.0...5.38.0) ##### Bug fixes Improve reliability of noticing a missing mouseup event during dragging. Make sure `getSelection` is always called on the correct document. Fix interpretation of line breaks and non-breaking spaces inserted by renderer in contentEditable mode. Work around some browsers inexplicably making the fake scrollbars focusable. Make sure `coordsChar` doesn't return positions inside collapsed ranges. [javascript mode](http://codemirror.net/mode/javascript/): Support block scopes, bindingless catch, bignum suffix, `s` regexp flag. [markdown mode](http://codemirror.net/mode/markdown/): Adjust a wasteful regexp. [show-hint addon](http://codemirror.net/doc/manual.html#addon_show-hint): Allow opening the control without any item selected. ##### New features New theme: [darcula](http://codemirror.net/demo/theme.html#darcula). [dialog addon](http://codemirror.net/doc/manual.html#addon_dialog): Add a CSS class (`dialog-opened`) to the editor when a dialog is open. ---

This PR has been generated by Renovate Bot.

algolia / community-project-boilerplate

fix(deps): update dependency codemirror to v5.38.0 #137