tsconfig.json

{
    "include": ["lib/**/*"],
    "compilerOptions": {
      // Tells TypeScript to read JS files, as
      // normally they are ignored as source files
      "allowJs": true,
      // Generate d.ts files
      "declaration": true,
      // This compiler run should
      // only output d.ts files
      //"emitDeclarationOnly": true,
      // Types should go into this directory.
      // Removing this would place the .d.ts files
      // next to the .js files
      "outDir": "dist",
      // go to js file when using IDE functions like
      // "Go to Definition" in VSCode
      "declarationMap": true,
      // don't check node modules
      "skipLibCheck": true,
      "esModuleInterop": true,
      "module": "commonjs",
      "target": "es6",
      "moduleResolution": "node",
      "strict": true,
      "forceConsistentCasingInFileNames": true,
      "noImplicitReturns": true, 
    }
  }