chore(backend-common): reworking backend common to use cross-fetch and new msw

packages/backend-common/package.json

@@ -32,10 +32,12 @@
     "@backstage/cli-common": "^0.1.1-alpha.24",
     "@backstage/config": "^0.1.1-alpha.24",
     "@backstage/config-loader": "^0.1.1-alpha.24",
+    "@backstage/test-utils": "^0.1.1-alpha.24",
     "@types/cors": "^2.8.6",
     "@types/express": "^4.17.6",
     "compression": "^1.7.4",
     "cors": "^2.8.5",
+    "cross-fetch": "^3.0.6",
     "express": "^4.17.1",
     "express-prom-bundle": "^6.1.0",
     "express-promise-router": "^3.0.3",
@@ -45,7 +47,6 @@
     "lodash": "^4.17.15",
     "logform": "^2.1.1",
     "morgan": "^1.10.0",
-    "node-fetch": "^2.6.0",
     "prom-client": "^12.0.0",
     "selfsigned": "^1.10.7",
     "stoppable": "^1.1.0",
@@ -72,8 +73,7 @@
     "get-port": "^5.1.1",
     "http-errors": "^1.7.3",
     "jest": "^26.0.1",
-    "jest-fetch-mock": "^3.0.3",
-    "msw": "^0.20.5",
+    "msw": "^0.21.2",
     "supertest": "^4.0.2"
   },
   "files": [