[FEATURE] price_info for other than today/tomorrow

[MazrimT]

Is your feature request related to a problem? Please describe.

price_info for a specific (historical) date or timeframe

Describe the solution you'd like

You have two great functions set up
current_subscription.price_info.today
current_subscription.price_info.tomorrow

But what if I want to get the price info for a specific historical date? would there be a way to add a way to do that?

Describe alternatives you've considered

Additional context

Reason is to get the historical data after the fact.

[BeatsuDev]

Thank you for the issue! I'll add the current_subscription.price_info.range() function as per the tibber API documentation.

[BeatsuDev]

@MazrimT It's now possible to get historical price data with the PriceInfo.fetch_range() method. I added an example to the README and published the changes to pypi in version 0.5.0.