Add latest ubuntu distribution support

[chompomonim]

At the moment we're building only for ubuntu 16.04 and 18.04. Update build script and Launchpad magic so Ubuntu 19.10 would be also supported.

Currently on Ubuntu 19.10 we're getting such error while running install script:

wireguard.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/5.3.0-18-generic/updates/dkms/

depmod...

DKMS: install completed.
Hit:1 https://repos.insights.digitalocean.com/apt/do-agent main InRelease
Hit:2 http://mirrors.digitalocean.com/ubuntu eoan InRelease
Ign:3 http://ppa.launchpad.net/mysteriumnetwork/node/ubuntu eoan InRelease
Hit:4 http://mirrors.digitalocean.com/ubuntu eoan-updates InRelease
Hit:5 http://ppa.launchpad.net/wireguard/wireguard/ubuntu eoan InRelease
Hit:6 http://mirrors.digitalocean.com/ubuntu eoan-backports InRelease
Err:7 http://ppa.launchpad.net/mysteriumnetwork/node/ubuntu eoan Release
  404  Not Found [IP: 2001:67c:1560:8008::15 80]
Hit:8 http://security.ubuntu.com/ubuntu eoan-security InRelease
Reading package lists... Done
E: The repository 'http://ppa.launchpad.net/mysteriumnetwork/node/ubuntu eoan Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.

[tadaskay]

Should we just wait for Ubuntu 20.04 LTS?
Or should we support all of the releases, not only LTS? @chompomonim @soffokl

[chompomonim]

People are expecting us to support all of the releases. If that is not complicated, I would go for all Ubuntu releases. This makes life of support people much easier.

[chompomonim]

Reopening task because it is still not possible to install myst via our default script on Ubuntu 19.10

Running: sudo -E bash -c "$(curl -s https://raw.githubusercontent.com/mysteriumnetwork/node/master/install.sh)" and getting same error as in task description.

[soffokl]

Required changes were added to the code.
To get a new release we need to publish a new release.

[soffokl]

Or should we support all of the releases, not only LTS? @chompomonim @soffokl

@tadaskay I think it will be good to support current LTS versions and the latest one, non-LTS.

[chompomonim]

@tadaskay I think it will be good to support current LTS versions and the latest one, non-LTS.

I agree with that.

[soffokl]

After the release, it works with no issue.