Nakama 2.2.0 release.

The format is based on [keep a changelog](http://keepachangelog.com) and this project uses [semantic versioning](http://semver.org).

## [Unreleased]

## [2.2.0] - 2018-11-11

### Added

- New runtime function to send raw realtime envelope data through streams.

### Changed

- Change error message on database errors raised during authentication operations.

- New default for maximum number of open database connections.

- Friend state indicators are no longer offset when sent to clients.

- Group state indicators are no longer offset when sent to clients.

- Increased metrics default report frequency to 60sec. 

- Improve error message on database errors raised during authentication operations.

- Set new default of 100 maximum number of open database connections.

- Friendship state is no longer offset by one when sent to clients.

- Group membership state is no longer offset by one when sent to clients.

- Set new default metrics report frequency to 60 seconds. 

### Fixed

- Correctly handle optional parameters in runtime functions to update account information.

- Correctly handle context cancellation in single-statement database operations.

- Account update optional inputs are not updated unless set in runtime functions.

- Fix boolean logic with context cancellation in single-statement database operations.

## [2.1.3] - 2018-11-02

### Added