tsconfig.json

{
  "compilerOptions": {
    "target": "es2016",                                  /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */
    "module": "commonjs",                                /* Specify what module code is generated. */
    "rootDir": "./src",                                  /* Specify the root folder within your source files. */
    "outDir": "./dist",
    "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. */
    "strict": true,                                      /* Enable all strict type-checking options. */
    "strictNullChecks": true,                            /* When type checking, take into account 'null' and 'undefined'. */
    "alwaysStrict": true,                                /* Ensure 'use strict' is always emitted. */
    "skipLibCheck": true                                 /* Skip type checking all .d.ts files. */
  },
  "exclude": ["node_modules/"],
  "include": ["src/**/*"]
}