tsconfig.json

{
  "compilerOptions": {
    "baseUrl": ".",
    "outDir": "build",
    // "declarationDir": "build/types",
    "rootDir": "src",
    "declaration": true,
    "esModuleInterop": true,
    "forceConsistentCasingInFileNames": true,
    "module": "commonjs",
    "moduleResolution": "node",
    "newLine": "LF",
    "noEmitOnError": true,
    "noFallthroughCasesInSwitch": true,
    "noImplicitReturns": true,
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "pretty": true,
    "removeComments": false,
    "sourceMap": true,
    "strict": true,
    "target": "es2017",
    "lib": ["es2017"],
    "typeRoots": [
      "./node_modules/@types",
    ]
  },
  "include": [
    "src/**/*"
  ]
}