Comment 36 for bug 1717040

I have some good results. Xenial first, and artful in a subsequent but comment.

XENIAL (details in the attached zstd-xenial.txt file):
starting with:
libzstd-dev 0.5.1-1
libzstd0 0.5.1-1
zstd 0.5.1-1

results in:
libzstd-dev 0.5.1-1
libzstd0 0.5.1-1
libzstd1 1.3.1+dfsg-1~ubuntu0.16.04.1~ppa3
zstd 1.3.1+dfsg-1~ubuntu0.16.04.1~ppa3

Installing the new 1.3.1 dev package results in the removal of the old one:
The following packages will be REMOVED:
  libzstd-dev
The following NEW packages will be installed:
  libzstd1-dev

which gives you:
libzstd0 0.5.1-1
libzstd1 1.3.1+dfsg-1~ubuntu0.16.04.1~ppa3
libzstd1-dev 1.3.1+dfsg-1~ubuntu0.16.04.1~ppa3
zstd 1.3.1+dfsg-1~ubuntu0.16.04.1~ppa3

RELEASE UPGRADE TO ARTFUL
a) starting with old 0.5.x dev package:
libzstd-dev 0.5.1-1
libzstd0 0.5.1-1
libzstd1 1.3.1+dfsg-1~ubuntu0.16.04.1~ppa3
zstd 1.3.1+dfsg-1~ubuntu0.16.04.1~ppa3

You end up with:
libzstd-dev 1.3.1+dfsg-1ubuntu0.1~ppa2
libzstd1 1.3.1+dfsg-1ubuntu0.1~ppa2
zstd 1.3.1+dfsg-1ubuntu0.1~ppa2

b) starting with new dev package:
libzstd0 0.5.1-1
libzstd1 1.3.1+dfsg-1~ubuntu0.16.04.1~ppa3
libzstd1-dev 1.3.1+dfsg-1~ubuntu0.16.04.1~ppa3
zstd 1.3.1+dfsg-1~ubuntu0.16.04.1~ppa3

You end up with:
libzstd-dev 1.3.1+dfsg-1ubuntu0.1~ppa2
libzstd1 1.3.1+dfsg-1ubuntu0.1~ppa2
libzstd1-dev 1.3.1+dfsg-1ubuntu0.1~ppa2
zstd 1.3.1+dfsg-1ubuntu0.1~ppa2