Changed version and build number

[zainbilalh]

Preparing for release!

Changed version number to 2.0.0, and build number to 1.

Fixed following bugs:

• Missing error state for highlights: Reused the existing game error state and updated it to accept a title and a retry closure tied to the specific ViewModel.
• Incorrect empty state after reload: The ViewModel previously switched to refreshing on reload if the model has ever fetched before, hiding the loading screen. It now only uses refreshing if previous state was success.
• False error when game count is divisible by 50: Errors were raised if any recursive fetch returned empty results. This now only triggers an error if the initial fetch is empty.
• Unpolished UI when highlight images fail to load: Replaced current failed-to-load image views with a simple solid gray background (temporary solution until caching is added).