Please update `mmsd-tng` to 1.13.0

Hello!

There is a bug in 1.12.1 where T-mobile will tell a user that an MMS is sent, but the MMSC silently dropped the MMS. This bug has been fixed and there is a new release for it. However, since PureOS does not package libsoup3, I tagged and released 1.13.0 specifically for PureOS:

https://gitlab.com/kop316/mmsd/-/tags/1.13.0

Aside from using libsoup3, the 1.x releases are identical in features to the 2.x version.