patch 8.2.3318: Vim9: cannot ignore quotes in number at the command line

Problem:    Vim9: cannot ignore quotes in number at the command line.
Solution:   Use in_vim9script() so that after ":vim9" quotes are ignored.

Author: brammool

src/testdir/test_float_func.vim

@@ -261,6 +261,10 @@ def Test_float_quotes()
   call assert_fails("echo string(123'456.7'89)", 'E116:')
 enddef
 
+func Test_float_quotes_from_legacy()
+  call assert_equal("\n123456.789", execute("vim9 echo 12'34'56.789"))
+endfunc
+
 func Test_float2nr()
   call assert_equal(1, float2nr(1.234))
   call assert_equal(123, float2nr(1.234e2))

src/typval.c

@@ -1704,7 +1704,7 @@ eval_number(
 	int	    want_string UNUSED)
 {
     int		len;
-    int		skip_quotes = current_sctx.sc_version >= 4;
+    int		skip_quotes = current_sctx.sc_version >= 4 || in_vim9script();
 #ifdef FEAT_FLOAT
     char_u	*p;
     int		get_float = FALSE;

src/version.c

@@ -755,6 +755,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    3318,
 /**/
     3317,
 /**/