Set module version to 2.12
Traditionally, the version on the master branch should be 2.12-git, but CMake does not allow the -git suffix. Therefore, use 2.12 right away. This should work just as well.
Edited by Oliver Sander
Traditionally, the version on the master branch should be 2.12-git, but CMake does not allow the -git suffix. Therefore, use 2.12 right away. This should work just as well.