patch 8.2.3094: Test_popup_atcursor_pos() fails without the conceal feature

Problem:    Test_popup_atcursor_pos() fails without the conceal feature.
Solution:   Add a check for the conceal feature. (Dominique Pellé,
            closes #8505)

src/testdir/test_popupwin.vim

@@ -1437,6 +1437,7 @@ endfunc
 
 func Test_popup_atcursor_pos()
   CheckScreendump
+  CheckFeature conceal
 
   let lines =<< trim END
 	call setline(1, repeat([repeat('-', 60)], 15))

src/version.c

@@ -755,6 +755,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    3094,
 /**/
     3093,
 /**/