version(sonar): bumping sonar version to 5.6 (lts) #21
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Problem:
Version 5.4 is unsupported by most of the plugin maintainers. If you run SonarQube 5.4 just to be able to use sonar-scala 0.0.3, the installation requires you to manually install older versions of other plugins that now support 5.6 only.
Solution:
Upgrading to support v6.x is not easy, as API has changed a lot. Updating to support SonarQube v5.6 LTS, however, is possible with no hassle, and it would make it possible to install/update latest versions of other plugins through SonarQube's web interface and make users' lives easier.
Proposed change:
Only bumping
sonar.version
to 5.6, no API changes.