Bump @types/ioredis from 4.14.9 to 4.17.3

Bumps [@types/ioredis](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/ioredis) from 4.14.9 to 4.17.3.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/ioredis)

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

Author: dependabot[bot]

package-lock.json

@@ -47,7 +47,7 @@
   },
   "devDependencies": {
     "@types/chai": "^4.2.8",
-    "@types/ioredis": "4.14.9",
+    "@types/ioredis": "4.17.3",
     "@types/chai-as-promised": "7.1.1",
     "@types/mocha": "^7.0.0",
     "@types/node": "13.13.0",