Abort when failing installation on CI

[bersbersbers]

Description

I run iex "& {$(irm get.scoop.sh)} -RunAsAdmin" in my GitLab CI.

The job continues even if scoop installation fails.

Possible Solution

Add an option to exit here, regardless of $IS_EXECUTED_FROM_IEX:

https://github.com/ScoopInstaller/Install/blob/656e17b67e8468edc5c5bd51bdad55642a03d9a4/install.ps1#L100-L105