chore(deps): update dependency typescript to v3.9.7

Author: renovate-bot

package.json

@@ -57,7 +57,7 @@
     "prettier": "1.18.2",
     "serve": "11.1.0",
     "stop-runaway-react-effects": "1.2.0",
-    "typescript": "3.7.0-dev.20190910",
+    "typescript": "3.9.7",
     "worker-loader": "2.0.0"
   },
   "jest": {

yarn.lock

@@ -9946,10 +9946,10 @@ typedarray@^0.0.6:
   resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
   integrity sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c=
 
-typescript@3.7.0-dev.20190910:
-  version "3.7.0-dev.20190910"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.7.0-dev.20190910.tgz#ba6e87bd334183a358407596c7b72d3b34016ea4"
-  integrity sha512-MRMLdZ54zlX5jD7codJKo6T4RmarAzE5YJxX2Xky8TUI99wLhc2WUoE+vOiOBLGrvHcF7E0ONxDzeQhJMXiRyg==
+typescript@3.9.7:
+  version "3.9.7"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.9.7.tgz#98d600a5ebdc38f40cb277522f12dc800e9e25fa"
+  integrity sha512-BLbiRkiBzAwsjut4x/dsibSTB6yWpwT5qWmC2OfuCg3GgVQCSgMs4vEctYPhsaGtd0AeuuHMkjZ2h2WG8MSzRw==
 
 ua-parser-js@^0.7.18:
   version "0.7.20"