dts-critic/testsource/tslib.d.ts

Checks a new .d.ts against the Javascript source and tells you what problems it has

// Type definitions for non-npm package tslib
// Project: https://github.com/microsoft/TypeScript
// Definitions by: TypeScript Bot <https://github.com/typescript-bot>
// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped