Sockethub 5.0.0-beta.4 fixes WhatsApp numbers and metadata images

Sockethub 5.0.0-beta.4 is available on the next release channel:

npm install -g sockethub@next

The container image is available at ghcr.io/sockethub/sockethub:next.

This release fixes WhatsApp recipient numbers that omit the leading plus sign, and restores real product images for Amazon pages and Reddit galleries in metadata previews. See the full changelog.