patch 8.2.2274: badge for Travis is outdated

Problem:    badge for Travis is outdated.
Solution:   Update badge for move from travis-ci.org to travis-ci.com.
diff --git a/src/version.c b/src/version.c
index 59f4b4d..458c3a0 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2274,
+/**/
     2273,
 /**/
     2272,