patch 8.2.1141: Vim9: return type of filter() is any

Problem:    Vim9: return type of filter() is any.
Solution:   Use type of the argument.

src/evalfunc.c

@@ -581,7 +581,7 @@ static funcentry_T global_functions[] =
     {"file_readable",	1, 1, FEARG_1,	  ret_number,	f_filereadable}, // obsolete
     {"filereadable",	1, 1, FEARG_1,	  ret_number,	f_filereadable},
     {"filewritable",	1, 1, FEARG_1,	  ret_number,	f_filewritable},
-    {"filter",		2, 2, FEARG_1,	  ret_any,	f_filter},
+    {"filter",		2, 2, FEARG_1,	  ret_first_arg, f_filter},
     {"finddir",		1, 3, FEARG_1,	  ret_string,	f_finddir},
     {"findfile",	1, 3, FEARG_1,	  ret_string,	f_findfile},
     {"flatten",		1, 2, FEARG_1,	  ret_list_any,	f_flatten},

src/testdir/test_vim9_func.vim

@@ -918,6 +918,15 @@ def Test_extend_return_type()
   assert_equal(6, res)
 enddef
 
+def Test_filter_return_type()
+  let l = filter([1, 2, 3], {-> 1})
+  let res = 0
+  for n in l
+    res += n
+  endfor
+  assert_equal(6, res)
+enddef
+
 def Line_continuation_in_def(dir: string = ''): string
     let path: string = empty(dir)
             \ ? 'empty'

src/version.c

@@ -754,6 +754,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1141,
 /**/
     1140,
 /**/