tsconfig.json

{
  "ts-node": {
    "experimentalResolver": true
  },
  "compilerOptions": {
    "module": "ESNext",
    "outDir": "./dist",
    "rootDir": "./src",
    "composite": true,
    "allowJs": true,
    "checkJs": true,
    "emitDeclarationOnly": true,
    "target": "ES2017",
    "declaration": true,
    "declarationMap": true,
    "sourceMap": true,
    "downlevelIteration": true,
    "strict": true,
    "moduleResolution": "node",
    "allowSyntheticDefaultImports": true,
    "esModuleInterop": true,
    "skipLibCheck": true,
    "forceConsistentCasingInFileNames": true,
    "lib": [
      "DOM",
      "DOM.Iterable",
      "ES6",
      "ES2017",
      // Allows array.flatMap. import `array-flat-polyfill` to cover node10
      "ES2019.array",
      "ScriptHost"
    ]
  },
  "include": [
    "src",
    "types"
  ],
  "exclude": [
    "src/browser",
    "tests",
    "dist"
  ]
}