patch 8.2.0787: libvterm code lags behind the upstream version

Problem:    Libvterm code lags behind the upstream version.
Solution:   Include revisions 741 - 742.
diff --git a/Filelist b/Filelist
index 21ec37d..422f18d 100644
--- a/Filelist
+++ b/Filelist
@@ -301,6 +301,7 @@
 		src/libvterm/LICENSE \
 		src/libvterm/Makefile \
 		src/libvterm/README \
+		src/libvterm/CONTRIBUTING \
 		src/libvterm/tbl2inc_c.pl \
 		src/libvterm/vterm.pc.in \
 		src/libvterm/doc/URLs \