patch 9.0.0989: popupwin test is more flaky on MacOS

Problem:    Popupwin test is more flaky on MacOS.
Solution:   Use a longer wait time.
diff --git a/src/testdir/test_popupwin.vim b/src/testdir/test_popupwin.vim
index 2aebea4..cd68bfd 100644
--- a/src/testdir/test_popupwin.vim
+++ b/src/testdir/test_popupwin.vim
@@ -1197,8 +1197,11 @@
   call assert_equal(0, popup_locate(1, 21))
   call assert_equal(0, popup_locate(2, 1))
 
-  sleep 700m
+  " Mac is usually a bit slow
+  let delay = has('mac') ? '900m' : '700m'
+  exe 'sleep ' .. delay
   redraw
+
   let line = join(map(range(1, 5), '1->screenstring(v:val)'), '')
   call assert_equal('hello', line)
 
@@ -1212,7 +1215,7 @@
   let line = join(map(range(1, 30), 'screenstring(&lines, v:val)'), '')
   call assert_match('.*on the command line.*', line)
 
-  sleep 700m
+  exe 'sleep ' .. delay
   redraw
   let line = join(map(range(1, 30), 'screenstring(&lines, v:val)'), '')
   call assert_notmatch('.*on the command line.*', line)
diff --git a/src/version.c b/src/version.c
index 4cb746e..6583d46 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    989,
+/**/
     988,
 /**/
     987,