Fixed email rendering of lexical posts

refs c489343831

- `lexicalLib.lexicalHtmlRenderer` can't be used directly because it's missing required config for nodes to render properly
- updated email serializers to use `lexicalLib.render()` instead

ghost/core/core/server/services/email-service/wrapper.js

@@ -58,7 +58,7 @@ class EmailServiceWrapper {
             settingsHelpers,
             renderers: {
                 mobiledoc: mobiledocLib.mobiledocHtmlRenderer,
-                lexical: lexicalLib.lexicalHtmlRenderer
+                lexical: lexicalLib
             },
             imageSize,
             urlUtils,

ghost/core/core/server/services/mega/post-email-serializer.js

@@ -303,7 +303,7 @@ const PostEmailSerializer = {
         }
 
         if (post.lexical) {
-            post.html = lexicalLib.lexicalHtmlRenderer.render(
+            post.html = lexicalLib.render(
                 post.lexical, {target: 'email', postUrl: post.url}
             );
         } else {