patch 8.0.1639: libvterm code lags behind master

Problem:    Libvterm code lags behind master.
Solution:   Sync to head, solve merge problems.
diff --git a/src/libvterm/t/26state_query.test b/src/libvterm/t/26state_query.test
index bfe8f69..3ace2d5 100644
--- a/src/libvterm/t/26state_query.test
+++ b/src/libvterm/t/26state_query.test
@@ -58,5 +58,5 @@
 PUSH "\e F"
 
 !Truncation on attempted buffer overflow
-PUSH "\e[6n" x 20
-  output "\e[10;10R" x 7
+PUSH "\e[6n" x 30
+  output "\e[10;10R" x 24