Missing CrossOver and TypicalPrice export in index.d.ts

[ZappaBoy]

Missing lines in declarations/index.d.ts:

export { TypicalPrice, typicalprice } from './chart_types/TypicalPrice';
export { crossOver, CrossOver } from './Utils/CrossOver';

Pull Request: https://github.com/anandanand84/technicalindicators/pull/209

I hope that's was helpful