Replaces MongoDB support with PostgreSQL (#151)

- All schemas have been rewritten to a relational model
- All services have been rewritten to accommodate the new data model
- Adds idempotency keys to core endpoints allowing you to retry requests with no additional side effects
- Adds staged jobs to avoid putting jobs in the queue when transactions abort
- Adds atomic transactions to all methods with access to the data layer

Co-authored-by: Oliver Windall Juhl <oliver@mrbltech.com>

packages/medusa-test-utils/package.json

@@ -1,6 +1,6 @@
 {
   "name": "medusa-test-utils",
-  "version": "1.0.13",
+  "version": "1.0.12-alpha.176+0646bd3",
   "description": "Test utils for Medusa",
   "main": "dist/index.js",
   "repository": {
@@ -29,8 +29,8 @@
   },
   "dependencies": {
     "@babel/plugin-transform-classes": "^7.9.5",
-    "medusa-core-utils": "^1.0.11",
-    "mongoose": "^5.8.0"
+    "medusa-core-utils": "^1.0.12-alpha.787+0646bd3",
+    "randomatic": "^3.1.1"
   },
-  "gitHead": "3cc7cbe5124cbcbb75f6e1435db4dcfaa2a60408"
+  "gitHead": "0646bd395a6056657cb0aa93c13699c4a9dbbcdd"
 }