Add prettier as an explicit dev dependency

package.json

@@ -5,8 +5,8 @@
   "main": "dist/index.js",
   "scripts": {
     "build": "tsc",
-    "format": "prettier --write '**/*.ts'",
-    "format-check": "prettier --check '**/*.ts'",
+    "format": "npx prettier --write '**/*.ts'",
+    "format-check": "npx prettier --check '**/*.ts'",
     "lint": "eslint --fix src/**/*.ts",
     "package": "ncc build --source-map --license licenses.txt",
     "test": "jest --testTimeout=10000",
@@ -36,6 +36,7 @@
     "eslint-plugin-n": "^15.1.0",
     "eslint-plugin-promise": "^6.0.0",
     "jest": "^28.0.0",
+    "prettier": "^3.5.3",
     "ts-jest": "^28.0.4",
     "typescript": "^4.6.4"
   },