hotfix: round totals (#188)

* fix: round totals

* fix: test

packages/medusa/src/services/__tests__/totals.js

@@ -377,7 +377,7 @@ describe("TotalsService", () => {
         },
       ])
 
-      expect(res).toEqual(1243.75)
+      expect(res).toEqual(1244)
     })
 
     it("calculates refund with item fixed discount", async () => {

packages/medusa/src/services/totals.js

@@ -328,10 +328,7 @@ class TotalsService extends BaseService {
   }
 
   rounded(value) {
-    const decimalPlaces = 4
-    return Number(
-      Math.round(parseFloat(value + "e" + decimalPlaces)) + "e-" + decimalPlaces
-    )
+    return Math.round(value)
   }
 }