feat(medusa): Add support for filtering with gt, lt, gte and lte (#190)

- Add support for filtering with lt, gt, lte, gte in the following format: created_at[gt]=01-26-1997
- Add middleware for cleaning request queries
- Add order query validation
- Temp. disables tags in claim integration tests

packages/medusa/src/api/middlewares/index.js

@@ -1,9 +1,11 @@
 import { default as authenticateCustomer } from "./authenticate-customer"
 import { default as authenticate } from "./authenticate"
+import { default as normalizeQuery } from "./normalized-query"
 import { default as wrap } from "./await-middleware"
 
 export default {
   authenticate,
   authenticateCustomer,
+  normalizeQuery,
   wrap,
 }