Bump TypeScript to 6.0 and update devDependencies

Updates @types/node to ^25.6.0, prettier to ^3.8.2, and typescript to
^6.0.2. TypeScript 6 no longer auto-includes @types packages, so
tsconfig.json now sets "types": ["node", "jest"] explicitly.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: kyleconroy

package-lock.json

@@ -30,16 +30,16 @@
   },
   "devDependencies": {
     "@types/jest": "^30.0.0",
-    "@types/node": "^25.5.2",
+    "@types/node": "^25.6.0",
     "@typescript-eslint/eslint-plugin": "^8.58.1",
     "@typescript-eslint/parser": "^8.58.1",
     "esbuild": "^0.28.0",
     "eslint": "^10.2.0",
     "jest": "^30.3.0",
     "jest-circus": "^30.3.0",
     "js-yaml": "^4.1.1",
-    "prettier": "^3.8.1",
+    "prettier": "^3.8.2",
     "ts-jest": "^29.4.9",
-    "typescript": "^5.9.3"
+    "typescript": "^6.0.2"
   }
 }

package.json

@@ -7,7 +7,8 @@
     "rootDir": "./src",                       /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */
     "strict": true,                           /* Enable all strict type-checking options. */
     "noImplicitAny": true,                    /* Raise error on expressions and declarations with an implied 'any' type. */
-    "esModuleInterop": true                   /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
+    "esModuleInterop": true,                  /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
+    "types": ["node", "jest"]
   },
   "exclude": ["node_modules", "**/*.test.ts"]
 }