Update project version to 0.9.0

Author: jbeder

CMakeLists.txt

@@ -8,7 +8,7 @@ if(POLICY CMP0091)
   cmake_policy(SET CMP0091 NEW)
 endif()
 
-project(YAML_CPP VERSION 0.8.0 LANGUAGES CXX)
+project(YAML_CPP VERSION 0.9.0 LANGUAGES CXX)
 
 set(YAML_CPP_MAIN_PROJECT OFF)
 if(CMAKE_SOURCE_DIR STREQUAL PROJECT_SOURCE_DIR)