include v1.6.0 on composite update-site

bump artifacts version to 1.6.0

bump artifacts version to 1.5.0

upgrade to xtext 2.33

use kubernetes CI runner

Merge pull request #121 from zazuko/issue_120_upgrade_to_xtext_2-26

Issue 120 upgrade to xtext 2 26

generate all flavors as baseline #118

xrm branding

v0.11.0

v0.10.0