* Upgrade actions to latest versions
* Upgrade Maven to 3.8.6
* Use Temurin JDK instead of Zulu JDK
The Temurin JDK is preinstalled in the [Ubuntu image](https://github.com/actions/virtual-environments/blob/main/images/linux/Ubuntu2004-Readme.md#java) whereas the Zulu JDK first need to be downloaded.
It should also perform better because the Temurin JDK is linked to glibc 2.12 whereas the Zulu JDK is linked to glibc 2.5.
Also adds missing wildcards to the .gitattributes file.
Signed-off-by: Wouter Born <github@maindrain.net>
* Add GHA CI build (Java 11/17)
* Add GHA build status badge
* Update required Java version range used by the enforcer plugin
Signed-off-by: Wouter Born <github@maindrain.net>