change version to 4.0.0

Author: Matt

framework/src/main/java/org/tron/program/Version.java

@@ -4,7 +4,7 @@ public class Version {
 
   public static final String versionName = "Odyssey-v3.6.6-1790-g2acc21a2f";
   public static final String versionCode = "12980";
-  private static final String version = "3.7";
+  private static final String version = "4.0.0";
 
   public static String getVersion() {
     return version;