tsconfig.json

{
  "compilerOptions": {

    /* Language and Environment */
    "target": "es2016",                                  /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */
    "lib": ["es6"],                                        /* Specify a set of bundled library declaration files that describe the target runtime environment. */

    /* Modules */
    "module": "commonjs",                                /* Specify what module code is generated. */
    "rootDir": ".",                                     /* Specify the root folder within your source files. */
    "moduleResolution": "node",                       /* Specify how TypeScript looks up a file from a given module specifier. */
    "outDir": "./build",
    "rootDirs": ["./src", "./test"],
    "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,
    /* Type Checking */
    "strict": false,
    "skipLibCheck": true                       
  }  ,
  "exclude": ["dist", "node_modules"],
  "include": ["./scripts/**/*", "./test/**/*", "**/*.ts", "**/*.js"],
}