[FEATURE] Update package.json

[jekiquin-bb]

Update package.json to use ts-node in running nodemon instead of concurrently

"scripts": {
    "start": "node build/index.js",
    "build": "tsc",
    "dev": "nodemon",
  },
"nodemonConfig": {
    "watch": [
      "./"
    ],
    "ext": "ts",
    "exec": "ts-node  --files ./index.ts"
  }