Outdated libupnp package causes that other apps (like amule) cannot be installed

I have been trying to install amule (version 2.3.3-r2 from edge) on an alpine docker container for armv7 (raspberry pi 4) architecture. However, aMule cannot be installed because of an issue with libupnp package. In particular, this is the error I get when trying to install amule:

fetch https://dl-cdn.alpinelinux.org/alpine/edge/main/armv7/APKINDEX.tar.gz
fetch https://dl-cdn.alpinelinux.org/alpine/edge/community/armv7/APKINDEX.tar.gz
fetch http://dl-cdn.alpinelinux.org/alpine/edge/testing/armv7/APKINDEX.tar.gz
ERROR: unable to select packages:
  so:libupnp.so.18 (no such package):
    required by: amule-2.3.3-r2[so:libupnp.so.18]

Asking on the #alpine-linux irc channel I was told that it looks as amule requires libupnp.so.18 but there is only 17. libupnp was lastly packaged by @fcolista so I hope he could eventually also help to spread some light on this issue.

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