fix(repl): search on computed plugins (#1795)

The plugins are not only those that have the keyword; but also those that start with it. 

see algolia/npm-search@a8a5265 to the change that did this, 

I already did #1623 and #1622, but it seems like that was reverted?

cc @xtuc

js/repl/ExternalPluginsModal.js

@@ -99,7 +99,7 @@ export default class ExternalPluginsModal extends React.Component<
     const { onClose, plugins } = this.props;
     const { officialOnly } = this.state;
 
-    let filters = "keywords:babel-plugin";
+    let filters = "computedKeywords:babel-plugin";
 
     if (officialOnly) {
       filters += " AND owner.name:babel";