Release pegasus 1.12.3

Author: neverchanje

src/include/pegasus/version.h

@@ -3,4 +3,4 @@
 // can be found in the LICENSE file in the root directory of this source tree.
 
 #pragma once
-#define PEGASUS_VERSION "1.12.3-RC3"
+#define PEGASUS_VERSION "1.12.3"