Set-ModuleFunctions powershell invoke error handling

[Dejulia489]

Resolved #97

[Dejulia489]

Before:

After:

[RamblingCookieMonster]

Hiyo! Thanks, and sorry for the... year of waiting? ouch!

Some quick questions:

• Could there be scenarios where both HadErrors is $false, and $Module is not defined? Would it be worth adding the -not $Module bit as an else if?
• Are there scenarios where HadErrors is $true, but the actual error stream is not indicative of an error state (e.g. asinine programs that write output to error stream)? I suspect this could happen. I wonder if a -IgnoreHadErrors parameter, with your logic changing to $PowerShell.HadErrors -and -not $IgnoreHadErrors or something along those lines would be worth it?

Cheers! cc @jonathanmedd