shopify-buy LineItem.compare_at_price can be null (#43898)
shopify-buy LineItem.compare_at_price can be null (#43898)

* LineItem.compare_at_price can be null, even according to the comments above the property

* Added myself to list of shopify-buy authors
georgemarshall/DefinitelyTyped,mcliment/DefinitelyTyped,markogresak/DefinitelyTyped,georgemarshall/DefinitelyTyped,georgemarshall/DefinitelyTyped,georgemarshall/DefinitelyTyped,dsebastien/DefinitelyTyped,dsebastien/DefinitelyTyped