tsconfig.json

{
  "compilerOptions": {
    "target": "ES2017",                       /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019' or 'ESNEXT'. */
    "module": "es2015",                       /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
    "moduleResolution": "node",               /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */
    "experimentalDecorators": true,           /* Enables experimental support for ES7 decorators. */
    "inlineSources": true,                    /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */
    "inlineSourceMap": true,                  /* Emit a single file with source maps instead of having a separate file. */
    "declaration": true,                      /* Generates corresponding '.d.ts' file. */
    "newLine": "LF",
    "outDir": "./dist",                       /* Redirect output structure to the directory. */
    "noImplicitAny": true,                    /* Raise error on expressions and declarations with an implied 'any' type. */
    "allowSyntheticDefaultImports": true      /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */
  },
  "include": [
    "src/**/*.ts"
  ]
}