Update TypeScript

package-lock.json

@@ -12105,9 +12105,9 @@
       "dev": true
     },
     "typescript": {
-      "version": "3.5.3",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.5.3.tgz",
-      "integrity": "sha512-ACzBtm/PhXBDId6a6sDJfroT2pOWt/oOnk4/dElG5G33ZL776N3Y6/6bKZJBFpd+b05F3Ct9qDjMeJmRWtE2/g==",
+      "version": "3.8.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.8.3.tgz",
+      "integrity": "sha512-MYlEfn5VrLNsgudQTVJeNaQFUAI7DkhnOjdpAp4T+ku1TfQClewlbSuTVHiA+8skNBgaf02TL/kLOvig4y3G8w==",
       "dev": true
     },
     "ua-parser-js": {

package.json

@@ -99,7 +99,7 @@
     "shx": "^0.3.2",
     "sinon": "^9.0.0",
     "terser-webpack-plugin": "^2.0.1",
-    "typescript": "3.5.3",
+    "typescript": "^3.8.3",
     "url-polyfill": "^1.1.5",
     "walk": "^2.3.9",
     "webpack": "4.42.1",