Bump send and express (#1951)

Bumps [send](https://github.com/pillarjs/send) to 0.19.0 and updates ancestor dependency [express](https://github.com/expressjs/express). These dependencies need to be updated together.


Updates `send` from 0.18.0 to 0.19.0
- [Release notes](https://github.com/pillarjs/send/releases)
- [Changelog](https://github.com/pillarjs/send/blob/master/HISTORY.md)
- [Commits](pillarjs/send@0.18.0...0.19.0)

Updates `express` from 4.20.0 to 4.21.0
- [Release notes](https://github.com/expressjs/express/releases)
- [Changelog](https://github.com/expressjs/express/blob/4.21.0/History.md)
- [Commits](expressjs/express@4.20.0...4.21.0)

---
updated-dependencies:
- dependency-name: send
  dependency-type: indirect
- dependency-name: express
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: danoswaltCL <[email protected]>

clientlibs/libTesters/ts-lib-tester-backend-server/package.json

@@ -18,7 +18,7 @@
   "license": "ISC",
   "dependencies": {
     "cors": "^2.8.5",
-    "express": "^4.20.0",
+    "express": "^4.21.0",
     "upgrade_client_1_1_7": "npm:[email protected]",
     "upgrade_client_1_1_8": "npm:[email protected]",
     "upgrade_client_3_0_18": "npm:[email protected]",