TypeScript compatibility notes

[smikitky]

Due to the recent updates of both TypeScript and multi-integer-range, those who use TypeScript to build your own project may run into compatibility issues.

Here's the summary:

• If you are not using TypeScript in your own project, forget this issue. This library works fine with vanilla JS, Babel, CoffeeScript, etc. (Otherwise please let me know!)
• Regardless of whether you want to enable --strictNullChecks, you need to update your TypeScript to 2.0.x before upgrading this library to 3.0.x. If you want to stay in TypeScript <= 1.8.x for a little longer, feel free to keep using multi-integer-range 2.0.x, which has no known major bugs.
• Regardless of the TypeScript version, do not use ES6 iterator (eg, for-of, spread operator) if your project is --target=es5. Down-level transformation works only with plain arrays.
• Regardless of the TypeScript version, add the snippet in README somewhere in your project if your project is --target=es6 and uses ES6 iterator.

[smikitky]

Things have changed, and the above summary is no longer valid. Down-level iteration for --target es5 is available since TS 2.3, although you need a polyfill and appropriate compilation flags. Details are in the documentation now.