Merge pull request #394 from jamessan/cmake-SOVERSION

Set SOVERSION to 4 for CMake builds

Author: redboltz

CMakeLists.txt

@@ -264,7 +264,7 @@ ADD_LIBRARY (msgpack-static STATIC
 SET_TARGET_PROPERTIES (msgpack-static PROPERTIES OUTPUT_NAME "msgpack")
 IF (MSGPACK_ENABLE_SHARED)
     SET_TARGET_PROPERTIES (msgpack PROPERTIES IMPORT_SUFFIX "_import.lib")
-    SET_TARGET_PROPERTIES (msgpack PROPERTIES SOVERSION 3 VERSION 4.0.0)
+    SET_TARGET_PROPERTIES (msgpack PROPERTIES SOVERSION 4 VERSION 4.0.0)
 ENDIF ()
 
 IF (MSGPACK_BUILD_TESTS)