Install Libinput 1.11.1 on Ubuntu 18.04

Open your web browser and go to:

https://launchpad.net/ubuntu/+source/libinput

Download these DEBs:

https://launchpad.net/ubuntu/+archive/primary/+files/libinput-bin_1.11.1-1_amd64.deb https://launchpad.net/ubuntu/+archive/primary/+files/libinput-tools_1.11.1-1_amd64.deb https://launchpad.net/ubuntu/+archive/primary/+files/libinput10_1.11.1-1_amd64.deb

Or just use wget.

Then install:

sudo dpkg -i *.deb

Enjoy.