tsconfig.json

{
  "compilerOptions": {
    "checkJs": false,
    "target": "es5",
    "module": "CommonJS",
    "lib": ["esnext", "dom"],
    "rootDir": "./src",                                  /* Specify the root folder within your source files. */
    "baseUrl": ".",                                  /* Specify the root folder within your source files. */
    "moduleResolution": "node",                       /* Specify how TypeScript looks up a file from a given module specifier. */
    "outDir": "./dist",                                   /* Specify an output folder for all emitted files. */
    "removeComments": true,                           /* Disable emitting comments. */
    "importHelpers": true,                            /* Allow importing sdk functions from tslib once per project, instead of including them per-file. */
    "importsNotUsedAsValues": "remove",               /* Specify emit/checking behavior for imports that are only used for types */
    "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. */
    "alwaysStrict": true,                             /* Ensure 'use strict' is always emitted. */
    "skipLibCheck": true,                                 /* Skip type checking all .d.ts files. */
  }
}