• Added api_app_id to slash command payloads (#573, #574) - Thanks @stevengill
• clientOptions gets passed down to @slack/oauth (#585, #586) - Thanks @stevengill
• Added a new property to installerOptions named authorizationUrl. This can be used to change the default authorization endpoint when doing OAuth. (#585, #586) - Thanks @stevengill
• Bolt-js now exposes exported interfaces from @slack/oauth and everything exported from @slack/types (#585, #586) - Thanks @stevengill