Wrapper components

[trevorblades]

Be more leniant about wrapper components. Specifically, allow this pattern:

<WrapperComponent>

<div data-language="Hooks">

```tsx
// TS code block
```

</div>

<div data-language="HOC">

```tsx
// TS code block
```

</div>

</WrapperComponent>

This should output four code blocks: Hooks (TypeScript), Hooks (JavaScript), HOC (TypeScript), and HOC (JavaScript)