patch 8.2.4140: maparg() does not indicate the type of script

Problem:    maparg() does not indicate the type of script where it was defined.
Solution:   Add "scriptversion".
diff --git a/src/map.c b/src/map.c
index b188e43..f16397a 100644
--- a/src/map.c
+++ b/src/map.c
@@ -222,6 +222,7 @@
 #ifdef FEAT_EVAL
 	int	    expr,
 	scid_T	    sid,	    // -1 to use current_sctx
+	int	    scriptversion,
 	linenr_T    lnum,
 #endif
 	int	    simplified)
@@ -259,11 +260,11 @@
     mp->m_simplified = simplified;
 #ifdef FEAT_EVAL
     mp->m_expr = expr;
-    if (sid >= 0)
+    if (sid > 0)
     {
 	mp->m_script_ctx.sc_sid = sid;
 	mp->m_script_ctx.sc_lnum = lnum;
-	mp->m_script_ctx.sc_version = in_vim9script() ? SCRIPT_VERSION_VIM9 : 0;
+	mp->m_script_ctx.sc_version = scriptversion;
     }
     else
     {
@@ -844,7 +845,7 @@
 	if (map_add(map_table, abbr_table, keys, rhs, orig_rhs,
 		    noremap, nowait, silent, mode, abbrev,
 #ifdef FEAT_EVAL
-		    expr, /* sid */ -1, /* lnum */ 0,
+		    expr, /* sid */ -1, /* scriptversion */ 0, /* lnum */ 0,
 #endif
 		    did_simplify && keyround == 1) == FAIL)
 	{
@@ -2302,6 +2303,8 @@
 	dict_add_number(dict, "expr", mp->m_expr ? 1L : 0L);
 	dict_add_number(dict, "silent", mp->m_silent ? 1L : 0L);
 	dict_add_number(dict, "sid", (long)mp->m_script_ctx.sc_sid);
+	dict_add_number(dict, "scriptversion",
+					    (long)mp->m_script_ctx.sc_version);
 	dict_add_number(dict, "lnum", (long)mp->m_script_ctx.sc_lnum);
 	dict_add_number(dict, "buffer", (long)buffer_local);
 	dict_add_number(dict, "nowait", mp->m_nowait ? 1L : 0L);
@@ -2371,6 +2374,7 @@
     int		silent;
     int		buffer;
     scid_T	sid;
+    int		scriptversion;
     linenr_T	lnum;
     mapblock_T	**map_table = maphash;
     mapblock_T  **abbr_table = &first_abbr;
@@ -2416,6 +2420,7 @@
     expr = dict_get_number(d, (char_u *)"expr") != 0;
     silent = dict_get_number(d, (char_u *)"silent") != 0;
     sid = dict_get_number(d, (char_u *)"sid");
+    scriptversion = dict_get_number(d, (char_u *)"scriptversion");
     lnum = dict_get_number(d, (char_u *)"lnum");
     buffer = dict_get_number(d, (char_u *)"buffer");
     nowait = dict_get_number(d, (char_u *)"nowait") != 0;
@@ -2446,10 +2451,11 @@
     vim_free(arg);
 
     (void)map_add(map_table, abbr_table, lhsraw, rhs, orig_rhs, noremap,
-	    nowait, silent, mode, is_abbr, expr, sid, lnum, 0);
+	    nowait, silent, mode, is_abbr, expr, sid, scriptversion, lnum, 0);
     if (lhsrawalt != NULL)
 	(void)map_add(map_table, abbr_table, lhsrawalt, rhs, orig_rhs, noremap,
-		nowait, silent, mode, is_abbr, expr, sid, lnum, 1);
+		nowait, silent, mode, is_abbr, expr, sid, scriptversion,
+								      lnum, 1);
     vim_free(keys_buf);
     vim_free(arg_buf);
 }