Deployment task is arbitrary string value

[mryanmurphy]

• Changed NewDeployment Task property to string
• Added string Task property to Deployment response
• Updated tests

Changes here align the project to the intended usage based on the documentation linked below.

The task parameter is used by the deployment system to allow different execution paths. In the web world this might be deploy:migrations to run schema changes on the system. In the compiled world this could be a flag to compile an application with debugging enabled.

https://docs.github.com/en/rest/reference/deployments#create-a-deployment

Fixes #2412

[nickfloyd]

Hey @mryanmurphy thank you for posting this, detailing the change, and making the contribution here ❤️ ! I am marking this as a breaking change just so that we can call it out in the release notes - technically this change shouldn't be problematic but since the type/representation has changed on the field I'd like to call that out... just giving you a head's up.

[nickfloyd]

release_notes: [Breaking change] Updates the NewDeployment Task property from the DeployTask enum to string - via REST API docs