patch 8.2.1998: terminal Cmd test sometimes fails to close popup

Problem:    Terminal Cmd test sometimes fails to close popup.
Solution:   Add "term_finish" option.
diff --git a/src/testdir/test_terminal.vim b/src/testdir/test_terminal.vim
index 7351647..846ec59 100644
--- a/src/testdir/test_terminal.vim
+++ b/src/testdir/test_terminal.vim
@@ -1259,15 +1259,14 @@
 
   inoremap <F3> <Cmd>call StartTermInPopup()<CR>
   func StartTermInPopup()
-    call term_start(['/bin/sh', '-c', 'cat'], #{hidden: v:true})->popup_create(#{highlight: 'Pmenu'})
+    call term_start(['/bin/sh', '-c', 'cat'], #{hidden: v:true, term_finish: 'close'})->popup_create(#{highlight: 'Pmenu'})
   endfunc
   call feedkeys("i\<F3>")
   sleep 10m
   call assert_equal('n', mode())
 
   call feedkeys("\<C-D>", 'xt')
-  sleep 20m
-  call feedkeys(":q\<CR>", 'xt')
+  sleep 50m
   delfunc StartTermInPopup
   iunmap <F3>
 endfunc
diff --git a/src/version.c b/src/version.c
index 0e9973e..186bbde 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1998,
+/**/
     1997,
 /**/
     1996,