Support typed bool, int and float in shortcode params

This means that you now can do:

    {{< vidur 9KvBeKu false true 32 3.14 >}}

And the boolean and numeric values will be converted to `bool`, `int` and `float64`.

If you want these to be  strings, they must be quoted:

    {{< vidur 9KvBeKu "false" "true" "32" "3.14" >}}

Fixes #6371

tpl/urls/urls.go

@@ -126,7 +126,13 @@ func (ns *Namespace) refArgsToMap(args interface{}) (map[string]interface{}, err
 		s  string
 		of string
 	)
-	switch v := args.(type) {
+
+	v := args
+	if _, ok := v.([]interface{}); ok {
+		v = cast.ToStringSlice(v)
+	}
+
+	switch v := v.(type) {
 	case map[string]interface{}:
 		return v, nil
 	case map[string]string:
@@ -152,6 +158,7 @@ func (ns *Namespace) refArgsToMap(args interface{}) (map[string]interface{}, err
 		}
 
 	}
+
 	return map[string]interface{}{
 		"path":         s,
 		"outputFormat": of,