tsconfig.json

{
  "compilerOptions": {
    "strict": true,
    /* Basic Options */
    "target": "es5",
    "module": "commonjs",
    "moduleResolution": "node",
    "declaration": true,

    /* Additional Checks */
    "noUnusedLocals": false /* Report errors on unused locals. */, // TODO: reenable (unused imports!)
    "noUnusedParameters": false /* Report errors on unused parameters. */, // TODO: set to true again
    "noImplicitReturns": true /* Report error when not all code paths in function return a value. */,
    "noFallthroughCasesInSwitch": true /* Report errors for fallthrough cases in switch statement. */,
    "typeRoots": ["./node_modules/@types"],
    "baseUrl": ".",
    "paths": {
      "*": ["./node_modules/*"]
    },

    "removeComments": true,
    "sourceMap": true,
    "outDir": "./dist",
    "noLib": false,
    "lib": ["es6"]
  },
  "exclude": ["./node_modules", "./dist", "./spec", "./__tests__"],
  "filesGlob": ["./**/*.ts"]
}