Pokemon GO v0.59.1 (Android) - v1.29.1 (iOS)

[pogotrainee]

From Niantic:

March 21, 2017

Pokémon GO updated to version 0.59.1 for Android and 1.29.1 for iOS

Trainers,

Pokémon GO is in the process of being updated to version 0.59.1 for Android and 1.29.1 for iOS devices. Below are some release notes and comments from our development team.

The 7-day ‘First PokéStop of the Day’ streak will now award a random Evolution item.
Minor text fixes.

—The Pokémon GO team

Data Mining of the new APK from Pokemon GO Hub

Trainers,

our data mining of 0.59.1 APK is complete! We are very excited to share our findings, but be aware that this data mining report contains spoilers for future features of Pokémon GO.

The 0.59.1 release is one of the biggest releases in a while, with multiple UI and performance improvements, bug fixes left and right and foundation for the future of Pokémon GO events.

Summary of our discoveries

Shiny Pokémon are now code complete!
A new Pokédex badge shows up if you’ve encountered a Shiny!
Redeemable codes introduced
New throw mechanic (throw grade) is being tested and introduced
Player nicknames can now be “blacked out”
Festivals (like Halloween) and Events (like Party Pikachu) are now split in the code base

There's more to read about the data mining through the link above this quote