patch 8.1.0595: libvterm tests are not run with coverage

Problem:    Libvterm tests are not run with coverage.
Solution:   Adjust the Travis config.  Show the actually run commands.
diff --git a/src/version.c b/src/version.c
index 0a94f31..83026ba 100644
--- a/src/version.c
+++ b/src/version.c
@@ -800,6 +800,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    595,
+/**/
     594,
 /**/
     593,