v0.42.1: Oops

I guess I didn't test thoroughly enough! Apologies for the busted release; a fix is being published to the gallery shortly!

Here are the fixed files, and they'll be up on the gallery in a few minutes. 😄

For those of you wanting to continue your koans run uninterrupted and without resetting, please run the following command to replace your file headers for compatibility:

Get-ChildItem -Path $env:PSKoans_Folder -Recurse -File | ForEach-Object {
    ( Get-Content -Path $_.FullName ) -replace '^#Requires.*PSKoans','using module PSKoans' |
        Set-Content $_.FullName
}