tsconfig.json

{
  "compilerOptions": {
    "rootDir": "src",
    "target": "es2016",                                  /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */
    "module": "commonjs",                                /* Specify what module code is generated. */
    "declaration": true,                              /* Generate .d.ts files from TypeScript and JavaScript files in your project. */
    "declarationMap": true,                           /* Create sourcemaps for d.ts files. */
    "emitDeclarationOnly": false,                      /* Only output d.ts files and not JavaScript files. */
    "sourceMap": true,                                /* Create source map files for emitted JavaScript files. */
    "outDir": "./dist",                                   /* Specify an output folder for all emitted files. */
    "isolatedModules": true,                          /* Ensure that each file can be safely transpiled without relying on other imports. */
    "esModuleInterop": true,                             /* Emit additional JavaScript to ease support for importing CommonJS modules. This enables 'allowSyntheticDefaultImports' for type compatibility. */
    "forceConsistentCasingInFileNames": true,            /* Ensure that casing is correct in imports. */
    "resolveJsonModule": true,
    "strict": false,                                      /* Enable all strict type-checking options. */
    "skipLibCheck": true,                                 /* Skip type checking all .d.ts files. */
    "types": [
      "mocha",
      "chai",
      "sinon",
      "sinon-chai"
    ],
  },
  "include": ["src/**/*"],
  "exclude": ["tests", "node_modules"]
}