Release v4.2.1

Hi all,

This release fixes the ability to search by gene name using the &loc= URL param which was broken after the release v4, and also fixes some MM tag parsing errors in BAM/CRAM files, and some issues with weird labels when zoomed in on variants.

Important extra note: We are rapidly iterating on a WebGPU/WebGL based accelerated rendering system for JBrowse 2, and are approaching a final product.

We are interested to hear from users and model organism database admins interested in beta testing and trying it out. The entire result is a relatively large code change, but we are aiming for minimal breaking changes for end users of the app.

Please contact jbrowse2@berkeley.edu for more info or visit #5468 for an overview/comment thread

bug

• Fix nav to search string via &loc= (#5544) @cmdcolin