chore: update dependency typescript to v3.9.6

Author: renovate-bot

package.json

@@ -95,7 +95,7 @@
     "lint-staged": "10.2.11",
     "prettier": "1.17.1",
     "ts-jest": "26.1.1",
-    "typescript": "3.8.2"
+    "typescript": "3.9.6"
   },
   "husky": {
     "hooks": {

yarn.lock

@@ -10625,10 +10625,10 @@ typedarray@^0.0.6:
   resolved "https://registry.npmjs.org/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
   integrity sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c=
 
-typescript@3.8.2:
-  version "3.8.2"
-  resolved "https://registry.npmjs.org/typescript/-/typescript-3.8.2.tgz#91d6868aaead7da74f493c553aeff76c0c0b1d5a"
-  integrity sha512-EgOVgL/4xfVrCMbhYKUQTdF37SQn4Iw73H5BgCrF1Abdun7Kwy/QZsE/ssAy0y4LxBbvua3PIbFsbRczWWnDdQ==
+typescript@3.9.6:
+  version "3.9.6"
+  resolved "https://registry.npmjs.org/typescript/-/typescript-3.9.6.tgz#8f3e0198a34c3ae17091b35571d3afd31999365a"
+  integrity sha512-Pspx3oKAPJtjNwE92YS05HQoY7z2SFyOpHo9MqJor3BXAGNaPUs83CuVp9VISFkSjyRfiTpmKuAYGJB7S7hOxw==
 
 uglify-js@^3.1.4:
   version "3.7.3"