patch 9.0.0019: timers test not run where possible

Problem:    Timers test not run where possible.
Solution:   Adjust platform checks. (closes #10645)

Author: zeertzjq

src/testdir/test_timers.vim

@@ -298,8 +298,9 @@ func Interrupt(timer)
 endfunc
 
 func Test_timer_peek_and_get_char()
-  CheckUnix
-  CheckGui
+  if !has('unix') && !has('gui_running')
+    throw 'Skipped: cannot feed low-level input'
+  endif
 
   call timer_start(0, 'FeedAndPeek')
   let intr = timer_start(100, 'Interrupt')
@@ -310,7 +311,7 @@ endfunc
 
 func Test_timer_getchar_zero()
   if has('win32') && !has('gui_running')
-    throw 'Skipped: cannot get low-level input'
+    throw 'Skipped: cannot feed low-level input'
   endif
   CheckFunction reltimefloat
 

src/version.c

@@ -735,6 +735,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    19,
 /**/
     18,
 /**/