feat(region): Add migration (#6320)

packages/region/integration-tests/__tests__/region-module.spec.ts

@@ -63,11 +63,7 @@ describe("Region Module Service", () => {
       expect.objectContaining({
         id: createdRegion.id,
         name: "Europe",
-        currency_code: "EUR",
-        currency: expect.objectContaining({
-          code: "eur",
-          name: "Euro",
-        }),
+        currency_code: "eur",
         countries: [],
       })
     )
@@ -80,7 +76,7 @@ describe("Region Module Service", () => {
       expect.objectContaining({
         id: region.id,
         name: "Europe",
-        currency_code: "EUR",
+        currency_code: "eur",
         currency: expect.objectContaining({
           code: "eur",
           name: "Euro",