Anyone knows how to get streamlink 1.5 installed on Ubuntu 18.04 LTS?

[Bo Berglund]

I have installed streamlink according to instructions:
https://streamlink.github.io/install.html

sudo add-apt-repository ppa:nilarimogard/webupd8
sudo apt update
sudo apt install streamlink

Works fine and a check shows this:
$ streamlink -V
streamlink 1.4.1

But the next step is confusing:
$ streamlink --version-check
[cli][info] A new version of Streamlink (1.5) is available!

So even though 1.5 is available the installation delivers the 1.4.1
version....

What can I do to get 1.5 instead?

My system is a fully updated Ubuntu Server 18.04.4 LTS system with no
GUI part installed. It is used as SVN host and Video host via Apache.
Everything maintenance-wise is done via PuTTY from Windows.

Any help appreciated!


-- 
Bo Berglund
Developer in Sweden