Upgrade to CodeMirror 6

[bitwiseman]

Code mirror 6 has been released. Migrating from 5.x to 6 will require some changes.
https://codemirror.net/docs/migration/

[fk00750]

Hey @bitwiseman can you assign me this issue

[mhnaeem]

@bitwiseman Is there a plan for this issue? The latest CodeMirror version does not support <script> tags anymore. Would the plan be to move to a build system like Webpack, Parcel, ESBuild, etc.

From migrations docs https://codemirror.net/docs/migration/:

The 5.x library was distributed as UMD modules, which could either be loaded directly with <script> tags or bundled as CommonJS modules. The new version exposes only modules, which will require some kind of build step before you can use them.

[bitwiseman]

@mhnaeem
I haven't looked into this task with any detail.
We already use webpack in our build. If you want to take this on, please do.