upgrade typeorm to 3.0 (#359)

* upgrade typeorm to 3.0

* use new datasource object in typeorm 3

* fix tests

* fix tests

* migrate before creating connection

* fail the test if migration failed

packages/api/package.json

@@ -75,8 +75,8 @@
     "snake-case": "^3.0.3",
     "supertest": "^6.2.2",
     "ts-loader": "^8.0.3",
-    "typeorm": "^0.2.37",
-    "typeorm-naming-strategies": "^2.0.0",
+    "typeorm": "^0.3.4",
+    "typeorm-naming-strategies": "^4.1.0",
     "urlsafe-base64": "^1.0.0",
     "uuid": "^8.3.1",
     "voca": "^1.4.0",