tsconfig.json

{
  "compilerOptions": {
    "module": "commonjs",
    "outDir": "lib",
    "target": "ES2015",
    "allowJs": true /* Allow javascript files to be compiled. */,
    "allowSyntheticDefaultImports": true /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */,
    "noImplicitThis": false /* Raise error on 'this' expressions with an implied 'any' type. */,
    "declaration": true /* Generates corresponding '.d.ts' file. */,
    "baseUrl": "src" /* Base directory to resolve non-absolute module names. */,
    "esModuleInterop": true /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */,
    "inlineSourceMap": false /* Emit a single file with source maps instead of having a separate file. */,
    "lib": ["esnext"] /* Specify library files to be included in the compilation. */,
    "listEmittedFiles": false,
    "listFiles": false,
    "moduleResolution": "node",
    "noFallthroughCasesInSwitch": true,
    "pretty": true,
    "resolveJsonModule": true,
    "skipLibCheck": true,
    "strict": true,
    "traceResolution": false,
    "types": ["node"],
    "experimentalDecorators": true /* Enables experimental support for ES7 decorators. */,
    "forceConsistentCasingInFileNames": true /* Disallow inconsistently-cased references to the same file. */
  },
  "include": ["src/**/*.js"],
  "exclude": ["node_modules", "dist", "lib", "**/*.spec.js", "**/*.unit.js"]
}