feat: Typescript for API layer (#817)

Co-authored-by: Philip Korsholm <88927411+pKorsholm@users.noreply.github.com>
Co-authored-by: Zakaria El Asri <33696020+zakariaelas@users.noreply.github.com>
Co-authored-by: Kasper Fabricius Kristensen <45367945+kasperkristensen@users.noreply.github.com>
Co-authored-by: Philip Korsholm <philip.korsholm@hotmail.com>
Co-authored-by: Sebastian Rindom <seb@medusa-commerce.com>

integration-tests/api/__tests__/admin/gift-cards.js

@@ -158,12 +158,15 @@ describe("/admin/gift-cards", () => {
     it("creates a gift card", async () => {
       const api = useApi()
 
+      const dateString = new Date().toISOString()
+
       const response = await api
         .post(
           "/admin/gift-cards",
           {
             value: 1000,
             region_id: "region",
+            ends_at: dateString,
           },
           {
             headers: {