patch 9.0.0001: Travis CI is no longer used

Problem:    Travis CI is no longer used.
Solution:   Delete the Travis CI configuration. (Hugo Osvaldo Barrera,
            closes #10636)
diff --git a/src/version.c b/src/version.c
index fd753bc..30abf34 100644
--- a/src/version.c
+++ b/src/version.c
@@ -736,6 +736,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1,
+/**/
     0
 };