A few notes on this line:

* this should ready `apply_filters( 'custom-metadata-manager-chosen-js', ... )`, looks like it was blindly copied from the line above.
* I'd prefer to see a new constant for chosen version, e.g. CUSTOM_METADATA_MANAGER_CHOSEN_VERSION, that way we only bump the version for chosen when we upgrade the files, this version # should match the version number of the currently included chosen version
* let's wrap this in a `if` statement with a filter so that users can disable chosen enqueuing if they want/need to