PublishRelease throws exception if no prior release is found

[jofme]

In the following line, there is a risk that 'LatestRelease' is null, therefore throwing an exception.

fscps.gh/PublishRelease/PublishRelease.ps1

Line 71 in 77827b2

$releaseNote = Get-ReleaseNotes -token $token -tag_name "$tag" -previous_tag_name $($latestRelease.tag_name)

I've managed to reproduce it a few times, and think it should be an easy fix. I will make a pull request with a fix soon