Update ROOT version files to v6.18/04.

Author: Axel-Naumann

build/version_number

@@ -1 +1 @@
-6.18/03
+6.18/04

core/base/inc/RVersion.h

@@ -14,10 +14,10 @@
  *
 */
 
-#define ROOT_RELEASE "6.18/03"
-#define ROOT_RELEASE_DATE "Aug 23 2019"
-#define ROOT_RELEASE_TIME "22:54:15"
+#define ROOT_RELEASE "6.18/04"
+#define ROOT_RELEASE_DATE "Sep 11 2019"
+#define ROOT_RELEASE_TIME "15:36:48"
 #define ROOT_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
-#define ROOT_VERSION_CODE ROOT_VERSION(6,18,3) /* 397827 */
+#define ROOT_VERSION_CODE ROOT_VERSION(6,18,4) /* 397828 */
 
 #endif