Update VERSION by PROJECT_VERSION to be compliant with new approach

CMakeLists.txt

@@ -7,7 +7,7 @@ find_package(cpptango CONFIG REQUIRED)
 find_package(yat CONFIG REQUIRED)
 
 add_compile_definitions(YAT4TANGO_PROJECT_NAME=${PROJECT_NAME})
-add_compile_definitions(YAT4TANGO_PROJECT_VERSION=${VERSION})
+add_compile_definitions(YAT4TANGO_PROJECT_VERSION=${PROJECT_VERSION})
 
 if (UNIX)
     add_definitions(-std=c++0x)

src/CMakeLists.txt

@@ -27,7 +27,7 @@ target_include_directories(yat4tango PUBLIC ${CMAKE_SOURCE_DIR}/include)
 target_link_libraries(yat4tango ${yat_LIBRARIES} ${cpptango_LIBRARIES})
 
 if(MAJOR_VERSION)
-  set_target_properties (yat4tango PROPERTIES VERSION ${VERSION} SOVERSION ${MAJOR_VERSION})
+  set_target_properties (yat4tango PROPERTIES VERSION ${PROJECT_VERSION} SOVERSION ${MAJOR_VERSION})
 endif()
 
 install (DIRECTORY ${CMAKE_SOURCE_DIR}/include/yat4tango DESTINATION include