Update dependency typescript to v3.9.8

Author: renovate-bot

package.json

@@ -87,7 +87,7 @@
     "style-loader": "1.3.0",
     "ts-jest": "25.5.1",
     "ts-node": "8.10.2",
-    "typescript": "3.8.3",
+    "typescript": "3.9.8",
     "webpack": "4.42.1",
     "webpack-cli": "3.3.11",
     "webpack-dev-server": "3.10.3"

yarn.lock

@@ -15300,7 +15300,12 @@ typedarray@^0.0.6:
   resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
   integrity sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c=
 
-[email protected], typescript@^3.8.3:
+[email protected]:
+  version "3.9.8"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.9.8.tgz#7d937ba4e4044af7fa83d127b982f8f61ca816a4"
+  integrity sha512-nDbnFkUZZjkQ92qwKX+C+jtk4OGfU8H9toSEs3uAsl8cxLjG2sqQm6leF/pLWvm9FAEJ6KHkYMAbHYaY2ITeVg==
+
+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==