Bump @types/express from 4.17.4 to 4.17.6 (#32)

Bumps [@types/express](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/express) from 4.17.4 to 4.17.6.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/express)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

package.json

   "devDependencies": {
     "@types/socket.io": "2.1.4",
     "@types/debug": "4.1.5",
-    "@types/express": "4.17.4",
+    "@types/express": "4.17.6",
     "@types/node": "13.9.8",
     "typescript": "3.8.3"
   },

yarn.lock

     "@types/node" "*"
     "@types/range-parser" "*"
 
-"@types/express@4.17.4":
-  version "4.17.4"
-  resolved "https://registry.yarnpkg.com/@types/express/-/express-4.17.4.tgz#e78bf09f3f530889575f4da8a94cd45384520aac"
-  integrity sha512-DO1L53rGqIDUEvOjJKmbMEQ5Z+BM2cIEPy/eV3En+s166Gz+FeuzRerxcab757u/U4v4XF4RYrZPmqKa+aY/2w==
+"@types/express@4.17.6":
+  version "4.17.6"
+  resolved "https://registry.yarnpkg.com/@types/express/-/express-4.17.6.tgz#6bce49e49570507b86ea1b07b806f04697fac45e"
+  integrity sha512-n/mr9tZI83kd4azlPG5y997C/M4DNABK9yErhFM6hKdym4kkmd9j0vtsJyjFIwfRBxtrxZtAfGZCNRIBMFLK5w==
   dependencies:
     "@types/body-parser" "*"
     "@types/express-serve-static-core" "*"