patch 8.2.0778: libvterm code lags behind the upstream version

Problem:    Libvterm code lags behind the upstream version.
Solution:   Include revisions 720 - 723.
diff --git a/src/version.c b/src/version.c
index b7e6d5c..fa05a76 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    778,
+/**/
     777,
 /**/
     776,