Update to 5.3.1. From the changelog:

Allow minimal imports by lazy loading dependencies. The following
dependencies are only needed if used:

- BeautifulSoup4 in verify_html
- allpairspy in pairwise approvals
- pyperclip in clipboard reporter

pkgsrc changes:

- Add an 'x11' option, off by default, to control the pyperclip
  dependency.

(schmonz)