add save line message to log

bin/dbVersion.json

@@ -16,7 +16,8 @@
     {"file": "20180811-1.sql", "version": 14},
     {"file": "20180815-1.sql", "version": 15},
     {"file": "20180816-1.sql", "version": 16},
-    {"file": "20180826-1.sql", "version": 17}
+    {"file": "20180826-1.sql", "version": 17},
+    {"file": "20180828-1.sql", "version": 18}
   ],
   "test": []
 }