The change log describes what is "Added", "Removed", "Changed" or "Fixed" between each release.

• Support for JWT authentication
• API for Organization\Members
• API for Integrations
• API for Repo\Cards
• API for Repo\Columns
• API for Repo\Projects
• Methods in Repo API for frequency and participation

• ApiLimitExceedException::__construct has a new second parameter for the remaining API calls.

• HTTPlug to decouple from Guzzle
• Github\Client::getLastResponse was added
• Support for PSR-6 cache
• Github\Client::addPlugin and Github\Client::removePlugin
• Github\Client::getApiVersion
• Github\Client::removeCache

• Uses of Github\HttpClient\HttpClientInterface is replaced by Http\Client\HttpClient ie the constructor of Github\Client.
• We use PSR-7's representation of HTTP message instead of Guzzle\Http\Message\Response and Guzzle\Http\Message\Request.
• Github\Client::addHeaders was added instead of Github\Client::setHeaders
• Signature of Github\Client::useCache has changed. First argument must be a CacheItemPoolInterface
• We use PSR-4 instead of PSR-0

• Support for PHP 5.3 and 5.4
• Github/HttpClient/HttpClientInterface was removed
• Github/HttpClient/HttpClient was removed
• All classes in Github/HttpClient/HttpClient/Listener/* were removed
• Github/HttpClient/CachedHttpClient was removed
• All classes in Github/HttpClient/Cache/* were removed

No change log before this version