chore(deps): Upgrade dependencies. (#6)

Author: kinyoklion

package.json

@@ -9,9 +9,9 @@
   "author": "LaunchDarkly <team@launchdarkly.com>",
   "license": "Apache-2.0",
   "devDependencies": {
-    "@types/node": "8.0.4",
-    "ts-node": "3.1.0",
-    "typescript": "2.4.1"
+    "@types/node": "20.4.2",
+    "ts-node": "10.9.1",
+    "typescript": "5.1.6"
   },
   "dependencies": {
     "@launchdarkly/node-server-sdk": ">= 8.0.0"