patch 8.1.1830: Travis does not report error when tests fail

Problem:    Travis does not report error when tests fail.
Solution:   Explicitly do "exit 1".
diff --git a/src/version.c b/src/version.c
index 4c2a83f..3fd1fe1 100644
--- a/src/version.c
+++ b/src/version.c
@@ -770,6 +770,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1830,
+/**/
     1829,
 /**/
     1828,