Allow "on_hold" workflows to be detected when deriving SHAs

[abaran30]

Describe Request:

Currently, the Nx orb will look to find the last successful workflow when deriving SHAs for Nx affected. Successful, in this case, means the CircleCI workflow has a status of success. However, this does not support main workflows that require manual approvals (e.g. deploy), as those workflows will have a status of on_hold. Because those are not considered failing workflows, we're requesting support for adding an option for the Nx orb to also check for workflows that have a status on_hold in order to support approval-based workflows.

Proposal:

#19

Supporting Documentation Links:

• Deploying with approval-based workflows | CircleCI
• CircleCI API

[meeroslav]

Solved by #19