Nakama 2.13.0 release.

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

## [Unreleased]

## [2.13.0] - 2020-08-31

### Added

- Support for Apple Sign In authentication, linking, and unlinking.

- Wallet operations now return the updated and previous state of the wallet.

- New runtime multi-update function.

- Add Sign in with Apple authentication, link, and unlink.

- Wallet operations now return the previous and updated state of the wallet.

- New multi-update runtime function to handle batched storage, wallet, and account updates in a single transaction.

- Groups now have a demote API for convenience.

### Changed

- Build with Go 1.15.0 release.

- Sanitize metric names and properties fields.

- Wallet operations now use int64 values for all numeric operations.

- Wallet updates now use int64 values to ensure precision in all numeric operations.

- Update to nakama-common 1.7.3 release.

- Optimize how session IDs are stored in presence structs.

- Friend listings now allow a page size of up to 1000 objects.

### Fixed

- Prevent bad presence list input to dispatcher message broadcasts from causing unexpected errors.

- Fix an issue in the Lua runtime nk module's `jwt_generate` function that would prevent it from accepting a key in 'RS256' format.

- Fix an issue in the Lua runtime nk module's `rsaSHA256Hash` function that would prevent it from parsing the input private key.

- Extra HTTP headers in RPC responses are set before the response is written to the buffer.

- Fix an issue in the Lua runtime nk module's "jwt_generate" function that would prevent it from accepting a key in RS256 format.

- Fix an issue in the Lua runtime nk module's "rsaSHA256Hash" function that would prevent it from parsing the input private key.

- Unmatched routes in the Nakama Console server now return a 404 rather than a 401 response.

## [2.12.0] - 2020-05-25

### Added