tsconfig.json

{
  "extends": "@voxpelli/tsconfig/node12.json",
  "files": [
    "index.js"
  ],
  "include": [
    "test/**/*.js"
  ],
  "compilerOptions": {
    // TODO: Remove once either of https://github.com/microsoft/TypeScript/issues/45748 and https://github.com/DefinitelyTyped/DefinitelyTyped/pull/55425 has been fixes
    "exactOptionalPropertyTypes": false
  }
}