chore(package): update @types/ioredis to version 4.14.9

Author: greenkeeper[bot]

package.json

@@ -47,7 +47,7 @@
   },
   "devDependencies": {
     "@types/chai": "^4.2.8",
-    "@types/ioredis": "4.14.7",
+    "@types/ioredis": "4.14.9",
     "@types/chai-as-promised": "7.1.1",
     "@types/mocha": "^7.0.0",
     "@types/node": "13.5.3",