Add missing encodings to S32-encoding/registry.t

Add utf32, uf16le, utf16be, windows-932, windows-1251 and windows-1252.

Author: samcv

S32-encoding/registry.t

@@ -1,11 +1,15 @@
+
 use Test;
 use lib $?FILE.IO.parent(2).add: 'packages';
 use Test;
 use Test::Util;
 
-plan 15;
+plan 40;
 
-for <utf8  utf-8  UTF-8  ascii  iso-8859-1  latin-1> -> $name {
+for <utf8  utf-8  UTF-8 ascii  iso-8859-1  latin-1 utf16 utf-16 UTF-16 UTF16
+     utf16le utf-16le utf16-le utf-16-le utf16be UTF16BE UTF-16be utf16-be
+     utf-16-be utf16-le UTF16-BE UTF16-LE windows932 windows-932 windows-1251
+     windows1251 windows-1252 windows1252 utf32 utf-32 UTF32> -> $name {
     group-of 3 => "Can find built-in $name encoding" => {
         given Encoding::Registry.find: $name {
             isa-ok  $_, Encoding::Builtin, 'type of result';