🏁 Releasing version 11.3.1

🏁 Releasing version 11.3.0

add single module demo for java 11

update veersion

Merge branch 'master' into master-11

# Conflicts:
#	CHANGELOG.md
#	pom.xml
#	workbenchfx-core/pom.xml
#	workbenchfx-demo/pom.xml

update version to 8.0.3 and 11.0.3

Merge branch 'master' into master-11

# Conflicts:
#	workbenchfx-demo/pom.xml

up version to 8.0.2 and 11.0.2

new before_install

from https://github.com/TestFX/TestFX/blob/master/.travis.yml

adjust badges for new github organization