chore(deps-dev): upgrade typescript to v6

Upgrade TypeScript from ^5.9.2 to ^6.0.2. Add explicit types
array to tsconfig.json for node and mocha since TS 6 no longer
auto-includes @types/* packages.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: dhensby

package-lock.json

@@ -50,8 +50,8 @@
     "nyc": "^18.0.0",
     "sinon": "^21.0.0",
     "sinon-chai": "^3.7.0",
-    "ts-node": "^10.9.1",
-    "typescript": "^5.9.2",
+    "ts-node": "^10.9.2",
+    "typescript": "^6.0.2",
     "typescript-eslint": "^8.58.2"
   },
   "dependencies": {

package.json

@@ -6,7 +6,8 @@
     "rootDir": "./src",                       /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */
     "sourceMap": true,
     "noImplicitAny": false,                   /* Raise error on expressions and declarations with an implied 'any' type. */
-    "resolveJsonModule": true                /* Allows importing modules with a '.json' extension, which is a common practice in node projects. */
+    "resolveJsonModule": true,               /* Allows importing modules with a '.json' extension, which is a common practice in node projects. */
+    "types": ["node", "mocha"]
   },
   "exclude": ["test", "lib", "node_modules", "misc"]
 }