tsconfig.json

{
  "compilerOptions": {
    "outDir": "lib/esm",
    "module": "commonjs",
    "target": "es5",
    "lib": [
      "es6",
      "dom",
      "es2016",
      "es2017",
      "esnext"
    ],
    "declaration": true,
    "moduleResolution": "node",
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "esModuleInterop": true,
    "noImplicitReturns": true,
    "noImplicitThis": true,
    "noImplicitAny": true,
    "strictNullChecks": false,
    "suppressImplicitAnyIndexErrors": true,
    "allowSyntheticDefaultImports": true,
    "allowJs": true,
    "strict": true,
    "experimentalDecorators": true,
    "baseUrl": "./",
    "paths": {
      "@app/*": [
        "src/*"
      ]
    }
  },
  "include": [
    "src/**/*"
  ],
  "exclude": [
    "node_modules",
    "lib",
    "**/__tests__/*"
  ]
}