tsconfig.json

{
  "compilerOptions": {
    "outDir": "./lib/",
    "sourceMap": true,
    "strict": true,
    "noImplicitReturns": true,
    "noImplicitAny": true,
    "module": "CommonJS",
    "moduleResolution": "node",
    "target": "es6",
    "allowJs": true,
    "baseUrl": "./",
    "paths": { "@/*": ["src/*"] }
  },
  "include": ["./src/**/*"]
}