patch 8.2.0048: another timers test is flaky on Travis for Mac

Problem:    Another timers test is flaky on Travis for Mac.
Solution:   Increase maximum expected time.
diff --git a/src/version.c b/src/version.c
index 420c722..0fc35dc 100644
--- a/src/version.c
+++ b/src/version.c
@@ -743,6 +743,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    48,
+/**/
     47,
 /**/
     46,