patch 8.1.1852: timers test is flaky

Problem:    Timers test is flaky.
Solution:   Accept a larger count.  Add test to list of flaky tests.
diff --git a/src/testdir/runtest.vim b/src/testdir/runtest.vim
index 9b41b46..fe02d88 100644
--- a/src/testdir/runtest.vim
+++ b/src/testdir/runtest.vim
@@ -333,6 +333,7 @@
       \ 'Test_quotestar()',
       \ 'Test_raw_one_time_callback()',
       \ 'Test_reltime()',
+      \ 'Test_repeat_many()',
       \ 'Test_repeat_three()',
       \ 'Test_server_crash()',
       \ 'Test_terminal_ansicolors_default()',
diff --git a/src/testdir/test_timers.vim b/src/testdir/test_timers.vim
index 367e46f..caeb230 100644
--- a/src/testdir/test_timers.vim
+++ b/src/testdir/test_timers.vim
@@ -43,7 +43,7 @@
   let timer = timer_start(50, 'MyHandler', {'repeat': -1})
   sleep 200m
   call timer_stop(timer)
-  call assert_inrange(2, 4, g:val)
+  call assert_inrange(2, 5, g:val)
 endfunc
 
 func Test_with_partial_callback()
diff --git a/src/version.c b/src/version.c
index 93867b8..abbb3b0 100644
--- a/src/version.c
+++ b/src/version.c
@@ -770,6 +770,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1852,
+/**/
     1851,
 /**/
     1850,