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",
    "test",
    "dist",
    "lib",
    "**/*.spec.js",
    "**/*.unit.js"
  ]
}