refactor(medusa-interfaces): Migrate baseService to TS + improve the service it self (#1314)

* refactor(medusa-interfaces): Migrate baseService to TS + improve the service it self

* feat(medusa,medusa-interfaces): Cleanup and move base-service to medusa core

* medusa(medusa, medusa-interfaces): Improve typings

* medusa(medusa, medusa-interfaces): buildQuery make properties optionals

* feat(medusa-interfaces): Revert temporarly the medusa-interfaces while moving the base-service to the medusa core

* feat(medusa): Improve base-service typings

* feat(medusa): Remove template that is not necessary

packages/medusa-file-spaces/package.json

@@ -24,7 +24,7 @@
     "cross-env": "^5.2.1",
     "eslint": "^6.8.0",
     "jest": "^25.5.2",
-    "medusa-test-utils": "^0.3.0"
+    "medusa-test-utils": "^1.1.37"
   },
   "scripts": {
     "build": "babel src -d .",