Upgrade to @shopify/post-purchase-ui-extensions-react

[dansc]

We currently use the old post purchase UI library for our app.

so we decided to upgrade to the recent which is @shopify/post-purchase-ui-extensions-react but unfortunately, i keep getting errors like seen below

<BlockStack /> is using incorrect casing. Use PascalCase for React components, or lowercase for HTML elements.
at BlockStack

this error appears any where the post-purchase-ui-extensions-react component is rendered.

[rickyk92]

I'm also seeing this, adding types to the tsconfig.json file did not fix it. I'm also struggling to get the correct types for  useExtensionInput<'Checkout::PostPurchase::Render'>();, specifically the Change type needed to pass to calculateChangeset.