fix: upgrade typescript

Author: felixfbecker

package.json

@@ -2,6 +2,9 @@
   "name": "@sourcegraph/create",
   "version": "0.0.0-DEVELOPMENT",
   "description": "CLI to bootstrap Sourcegraph npm packages",
+  "engines": {
+    "node": "^14.0.0"
+  },
   "repository": {
     "type": "git",
     "url": "git+https://github.com/sourcegraph/create.git"
@@ -75,6 +78,6 @@
     "json-schema-to-typescript": "^8.2.0",
     "prettier": "^2.1.2",
     "semantic-release": "^17.0.6",
-    "typescript": "^3.9.3"
+    "typescript": "^4.1.3"
   }
 }

yarn.lock

@@ -6845,10 +6845,10 @@ typedarray@^0.0.6:
   resolved "https://registry.yarnpkg.com/typedarray/-/typedarray-0.0.6.tgz#867ac74e3864187b1d3d47d996a78ec5c8830777"
   integrity sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c=
 
-typescript@^3.9.3:
-  version "3.9.3"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.9.3.tgz#d3ac8883a97c26139e42df5e93eeece33d610b8a"
-  integrity sha512-D/wqnB2xzNFIcoBG9FG8cXRDjiqSTbG2wd8DMZeQyJlP1vfTkIxH4GKveWaEBYySKIg+USu+E+EDIR47SqnaMQ==
+typescript@^4.1.3:
+  version "4.1.3"
+  resolved "https://registry.npmjs.org/typescript/-/typescript-4.1.3.tgz#519d582bd94cba0cf8934c7d8e8467e473f53bb7"
+  integrity sha512-B3ZIOf1IKeH2ixgHhj6la6xdwR9QrLC5d1VKeCSY4tvkqhF2eqd9O7txNlS0PO3GrBAFIdr3L1ndNwteUbZLYg==
 
 uglify-js@^3.1.4:
   version "3.6.7"