patch 8.1.0298: window resize test sometimes fails on Mac

Problem:    Window resize test sometimes fails on Mac.
Solution:   Add Test_popup_and_window_resize() to flaky tests.
diff --git a/src/version.c b/src/version.c
index 99f86e7..ac39425 100644
--- a/src/version.c
+++ b/src/version.c
@@ -795,6 +795,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    298,
+/**/
     297,
 /**/
     296,