2019.2.13f1 fails to install on linux

[BastianBlokland]

Issue Checklist

• [ x] I'm using the latest u3d version
• [ x] I ran u3d --help
• [ x] I read the README
• [ x] I made sure that a similar issue doesn't exit

Issue Description

Thanks for the great tool, its been working great for the past year for us.
However Unity 2019.2.13f1 fails to install on linux ci. Are there any workarounds available?

Logs:

�[33mRoot privileges are required�[0m
�[32m---------------------------------------------------------�[0m
�[32m--- Downloading Unity 2019.2.13f1 version 2019.2.13f1 ---�[0m
�[32m---------------------------------------------------------�[0m
Downloading from �[4m�[36mhttps://download.unity3d.com/download_unity/e20f6c7e5017/LinuxEditorInstaller/Unity.tar.xz�[0m�[0m
Download will be found at /home/vsts/Downloads/Unity_Packages/2019.2.13f1/Unity.tar.xz
�[32mSuccessfully downloaded Unity.�[0m
�[32m--------------------------------------------�[0m
�[32m--- Installing Unity 2019.2.13f1 (Unity) ---�[0m
�[32m--------------------------------------------�[0m
Installing with /home/vsts/Downloads/Unity_Packages/2019.2.13f1/Unity.tar.xz
�[4m�[36m$ mkdir -p /opt/unity-editor-2019.2.13f1; cd /opt/unity-editor-2019.2.13f1; tar xf /home/vsts/Downloads/Unity_Packages/2019.2.13f1/Unity.tar.xz�[0m�[0m
�[32mInstallation successful�[0m
/var/lib/gems/2.5.0/gems/u3d-1.2.1/lib/u3d/installation.rb:242:in `version': Couldn't find a module under /opt/unity-editor-2019.2.13f1/Editor/Data/ (RuntimeError)
	from /var/lib/gems/2.5.0/gems/u3d-1.2.1/lib/u3d/installer.rb:318:in `block in install'
	from /var/lib/gems/2.5.0/gems/u3d-1.2.1/lib/u3d/installer.rb:318:in `select'
	from /var/lib/gems/2.5.0/gems/u3d-1.2.1/lib/u3d/installer.rb:318:in `install'
	from /var/lib/gems/2.5.0/gems/u3d-1.2.1/lib/u3d/installer.rb:61:in `block in install_modules'
	from /var/lib/gems/2.5.0/gems/u3d-1.2.1/lib/u3d/installer.rb:58:in `each'
	from /var/lib/gems/2.5.0/gems/u3d-1.2.1/lib/u3d/installer.rb:58:in `install_modules'
	from /var/lib/gems/2.5.0/gems/u3d-1.2.1/lib/u3d/commands.rb:170:in `install'
	from /var/lib/gems/2.5.0/gems/u3d-1.2.1/lib/u3d/commands_generator.rb:173:in `block (2 levels) in run'
	from /var/lib/gems/2.5.0/gems/commander-4.4.7/lib/commander/command.rb:182:in `call'
	from /var/lib/gems/2.5.0/gems/commander-4.4.7/lib/commander/command.rb:153:in `run'
	from /var/lib/gems/2.5.0/gems/commander-4.4.7/lib/commander/runner.rb:446:in `run_active_command'
	from /var/lib/gems/2.5.0/gems/commander-4.4.7/lib/commander/runner.rb:68:in `run!'
	from /var/lib/gems/2.5.0/gems/commander-4.4.7/lib/commander/delegates.rb:15:in `run!'
	from /var/lib/gems/2.5.0/gems/u3d-1.2.1/lib/u3d/commands_generator.rb:260:in `run'
	from /var/lib/gems/2.5.0/gems/u3d-1.2.1/lib/u3d/commands_generator.rb:40:in `start'
	from /var/lib/gems/2.5.0/gems/u3d-1.2.1/exe/u3d:7:in `<top (required)>'
	from /usr/local/bin/u3d:23:in `load'
	from /usr/local/bin/u3d:23:in `<main>'

[lacostej]

Most probably related to #384. I hope to have something working this week.