add commands for managing webhooks (#314)

* add webhook:create command

* add webhook:list command

* add webhook:view command

* add webhook:update command

* add webhook:delete command

* generate graphql code

* update CHANGELOG

* address PR feedback

CHANGELOG.md

@@ -9,6 +9,7 @@ This is the log of notable changes to EAS CLI and related packages.
 ### 🎉 New features
 
 - Display more friendly error messages when `eas submit` fails. ([#311](https://github.com/expo/eas-cli/pull/297) by [@barthap](https://github.com/barthap))
+- Add support for managing environment secrets (new commands: `webhook:create`, `webhook:view`, `webhook:list`, `webhook:update`, and `webhook:delete`). ([#314](https://github.com/expo/eas-cli/pull/314) by [@dsokal](https://github.com/dsokal))
 
 ### 🐛 Bug fixes
 
@@ -36,7 +37,6 @@ This is the log of notable changes to EAS CLI and related packages.
 ### 🎉 New features
 
 - `build:view` and `build:list` now showing the distribution type (store / internal) and release channel. ([#284](https://github.com/expo/eas-cli/pull/284) by [@vthibault](https://github.com/vthibault))
-
 - Add analytics to EAS Build. ([#162](https://github.com/expo/eas-cli/pull/162) by [@wkozyra95](https://github.com/wkozyra95))
 - Improve tar archive support in EAS Submit. ([#297](https://github.com/expo/eas-cli/pull/297) by [@barthap](https://github.com/barthap))