Bump version to 0.8.57

Author: Gioee

src/cloudsync.h

@@ -20,7 +20,7 @@
 extern "C" {
 #endif
 
-#define CLOUDSYNC_VERSION                       "0.8.56"
+#define CLOUDSYNC_VERSION                       "0.8.57"
 
 int sqlite3_cloudsync_init (sqlite3 *db, char **pzErrMsg, const sqlite3_api_routines *pApi);