$jsontool and $escapetool should escape < to allow safe usage in <script> tags

{{velocity}}{{html}}
<script>$jsontool.serialize({
  'closeComment': '-->',
  'closeScript': '</script>',
  'openComment': '<!--',
  'openScript': '<script>'
});
'$escapetool.javascript('<!--')';
</script>
<h1>Success! 🎉</h1>
{{/html}}{{/velocity}}