Update loot-plugin-editor

Editor data is now set only with setEditorData(), the `data`
member has been removed. All metadata changes need to be
propagated using setEditorData(). Plugin name, version and crc
now exist in the editor's light DOM.

scripts/vulcanize.js

@@ -66,6 +66,7 @@ function vulcanizeTests(releasePath) {
     'test_loot-custom-icons.html',
     'test_loot-dropdown-menu.html',
     'test_loot-message-dialog.html',
+    'test_loot-plugin-editor.html',
     'test_loot-plugin-item.html',
     'test_loot-search-toolbar.html',
   ];