Support Windows PowerShell

[MariusStorhaug]

Description

• Enable tests for Windows PowerShell.

Type of change

• 📖 [Docs]
• 🪲 [Fix]
• 🩹 [Patch]
• ⚠️ [Security fix]
• 🚀 [Feature]
• 🌟 [Breaking change]

Checklist

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas

[MariusStorhaug]

Its too expensive.

• Need rework of ConvertFrom-Json, -AsHashtable is not supported.
• Need rework of Invoke-GitHubAPI, as -FollowRelLink, HttpVersion, Authentication, Token ++ is not supported in Windows PowerShell 5.1. HttpVersion is not even supported in 7.2.

This then serves as a reminder that we will only support the latest version of PowerShell, assuming that developers that use GitHub actually can install PowerShell (core) on their machines.