Build(deps): Bump express in /Predictor/PredictorWebService

Bumps [express](https://github.com/expressjs/express) from 4.17.1 to 4.17.3.
- [Release notes](https://github.com/expressjs/express/releases)
- [Changelog](https://github.com/expressjs/express/blob/master/History.md)
- [Commits](https://github.com/expressjs/express/compare/4.17.1...4.17.3)

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

Signed-off-by: dependabot[bot] <support@github.com>

Predictor/PredictorWebService/package.json

@@ -7,7 +7,7 @@
     "body-parser": "^1.18.3",
     "canvas": "^2.4.1",
     "cors": "^2.8.5",
-    "express": "^4.16.4",
+    "express": "^4.17.3",
     "mongodb": "^3.3.3",
     "mongoose": "^5.7.7",
     "nodemon": "^1.18.10",