Committing to futures is not stabilized

Fixes some issues regarding to which futures were included when running the artisan command.

• untillDate now includes all uncommitted dates since the beginning of time
• When committing futures in the CommitToFutureCommand, use untillDate not forDate

Big applause to @egeriis! 🎉

Updated FuturePlanner API

Changelog

• Rename FuturePlanner#for method to FuturePLanner#at.

This is a breaking change!

Package rename

• Renamed package from laravel-model-future to eloquent-model-future
• Fixed error in service provider where it would error when no futures were available