cmake: added library version information to the targets.

src/external/MusrRoot/CMakeLists.txt

@@ -19,6 +19,13 @@ add_library(TMusrRunHeader SHARED
   TMusrRunHeader.cpp
   TMusrRunHeaderDict.cxx
 )
+
+#--- set target properties, e.g. version --------------------------------------
+set_target_properties(TMusrRunHeader
+  PROPERTIES
+    VERSION ${MUSR_ROOT_VERSION}
+)
+
 #--- make sure that the include directory is found ----------------------------
 target_include_directories(
   TMusrRunHeader BEFORE PRIVATE $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>