patch 8.1.1156: Unicode emoji and other image characters not recognized

Problem:    Unicode emoji and other image characters not recognized.
Solution:   Add ranges for musical notation, game pieces, etc. (Martin
            Tournoij, closes #4238)
diff --git a/src/version.c b/src/version.c
index de7a99d..334a7ec 100644
--- a/src/version.c
+++ b/src/version.c
@@ -772,6 +772,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1156,
+/**/
     1155,
 /**/
     1154,