Update the project to version 0.9.0.

In preparation for the next tag to be made.

Author: krasznaa

CMakeLists.txt

@@ -6,7 +6,7 @@
 
 # Set up the project.
 cmake_minimum_required( VERSION 3.9 )
-project( traccc VERSION 0.6.0 LANGUAGES CXX )
+project( traccc VERSION 0.9.0 LANGUAGES CXX )
 
 # Set up the used C++ standard(s).
 set( CMAKE_CXX_STANDARD 17 CACHE STRING "The (host) C++ standard to use" )