Update dependency typescript to v3.9.6

Author: renovate-bot

package.json

@@ -47,7 +47,7 @@
         "ts-node": "8.10.1",
         "tsconfig-paths": "3.9.0",
         "typedoc": "0.17.6",
-        "typescript": "3.8.3",
+        "typescript": "3.9.6",
         "@types/ioredis": "4.14.3",
         "prettier": "2.0.5"
     },

yarn.lock

@@ -5265,10 +5265,10 @@ typedoc@0.17.6:
     shelljs "^0.8.4"
     typedoc-default-themes "^0.10.1"
 
-typescript@3.8.3:
-  version "3.8.3"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.8.3.tgz#409eb8544ea0335711205869ec458ab109ee1061"
-  integrity sha512-MYlEfn5VrLNsgudQTVJeNaQFUAI7DkhnOjdpAp4T+ku1TfQClewlbSuTVHiA+8skNBgaf02TL/kLOvig4y3G8w==
+typescript@3.9.6:
+  version "3.9.6"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.9.6.tgz#8f3e0198a34c3ae17091b35571d3afd31999365a"
+  integrity sha512-Pspx3oKAPJtjNwE92YS05HQoY7z2SFyOpHo9MqJor3BXAGNaPUs83CuVp9VISFkSjyRfiTpmKuAYGJB7S7hOxw==
 
 uglify-js@^3.1.4:
   version "3.7.5"