fix(backend-common): move some @types to devdeps for now

packages/backend-common/package.json

@@ -27,8 +27,6 @@
     "clean": "backstage-cli clean"
   },
   "dependencies": {
-    "@types/stoppable": "^1.1.0",
-    "@types/webpack-env": "^1.15.2",
     "compression": "^1.7.4",
     "cors": "^2.8.5",
     "express": "^4.17.1",
@@ -44,7 +42,9 @@
     "@types/express": "^4.17.6",
     "@types/http-errors": "^1.6.3",
     "@types/morgan": "^1.9.0",
+    "@types/stoppable": "^1.1.0",
     "@types/supertest": "^2.0.8",
+    "@types/webpack-env": "^1.15.2",
     "@types/yaml": "^1.9.7",
     "get-port": "^5.1.1",
     "http-errors": "^1.7.3",