Revert "upadte typescript"

This reverts commit bb3a7f6821.

package-lock.json

@@ -13839,9 +13839,9 @@
       }
     },
     "typescript": {
-      "version": "3.8.3",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.8.3.tgz",
-      "integrity": "sha512-MYlEfn5VrLNsgudQTVJeNaQFUAI7DkhnOjdpAp4T+ku1TfQClewlbSuTVHiA+8skNBgaf02TL/kLOvig4y3G8w==",
+      "version": "3.2.4",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.2.4.tgz",
+      "integrity": "sha512-0RNDbSdEokBeEAkgNbxJ+BLwSManFy9TeXz8uW+48j/xhEXv1ePME60olyzw2XzUqUBNAYFeJadIqAgNqIACwg==",
       "dev": true
     },
     "uglify-js": {

package.json

@@ -251,7 +251,7 @@
     "ts-loader": "^5.3.3",
     "tslint": "^5.12.1",
     "tslint-loader": "^3.5.4",
-    "typescript": "3.8.3",
+    "typescript": "3.2.4",
     "webpack": "^4.29.0",
     "webpack-cli": "^3.2.1",
     "webpack-merge": "^4.2.1",