Merge branch 'master' of github.com:spotify/backstage into migrate-to-msw

* 'master' of github.com:spotify/backstage: (110 commits)
  chore(catalog-backend): removing redudant classes and some functions
  chore(deps-dev): bump @types/webpack from 4.41.21 to 4.41.22 (#2765)
  move codecov.yml to .github
  feat(catalog-backend): add batch concurrency
  create-app: remove build step
  cli: simplify jest transform ignore regex
  feat(catalog-backend): introduce batching, speed up reading and writing of large datasets
  Techdocs: add Azure DevOps prepare support (#2748)
  feat(techdocs-header): Show breadcrumbs on docs page (#2786)
  changesets: add entry for create-app template location fix
  create-app: revert to github location type for example templates
  fix: make catalog filter work again
  Use new url scheme for techdocs
  feat: remove LocationProcessor.processEntity
  Add Dockerfile for helm chart
  feat: use the new UrlReader in the CodeOwnersProcessor
  feat: use new UrlReader in PlaceholderProcessor
  feat: remove the backstage.io/definition-at-location annotation
  Update loud-lamps-visit.md
  feat(proxy-backend): limit the forwarded http headers to a safe set
  ...

plugins/proxy-backend/package.json

@@ -22,7 +22,6 @@
     "@backstage/backend-common": "^0.1.1-alpha.24",
     "@backstage/config": "^0.1.1-alpha.24",
     "@types/express": "^4.17.6",
-    "@types/http-proxy-middleware": "^0.19.3",
     "express": "^4.17.1",
     "express-promise-router": "^3.0.3",
     "http-proxy-middleware": "^0.19.1",
@@ -35,6 +34,8 @@
   },
   "devDependencies": {
     "@backstage/cli": "^0.1.1-alpha.24",
+    "@types/http-proxy-middleware": "^0.19.3",
+    "@types/supertest": "^2.0.8",
     "@types/uuid": "^8.0.0",
     "@types/yup": "^0.28.2",
     "supertest": "^4.0.2"