Add support for named slots (#661)

* feat: support named slots, slot fallback content

* docs: document slots

* chore: add changeset

* fix: build errors

* chore: prefer `patch` version

1 files changed, 1 insertions, 1 deletions

diff --git a/packages/markdown-support/src/rehype-expressions.ts b/packages/markdown-support/src/rehype-expressions.ts
index 016d36aaf..d296c2afe 100644
--- a/packages/markdown-support/src/rehype-expressions.ts
+++ b/packages/markdown-support/src/rehype-expressions.ts
@@ -4,7 +4,7 @@ export default function rehypeExpressions(): any {
   return function (node: any): any {
     return map(node, (child) => {
       if (child.type === 'mdxTextExpression') {
-        return { type: 'text', value: `{${child.value}}` };
+        return { type: 'text', value: `{${(child as any).value}}` };
       }
       return child;
     });