Handle multiple versions of powershellPnp with Sharepoint

 This is a nice way to handle accessing different versions of PNPPowershell. 
I use this when switching between onpremise environments of different version and online.

Note that env-variables can't be used until session, like ISE is restarted. Otherwise can variable be accessed immediatly using 
[System.Environment]::GetEnvironmentVariable('SharePointPnPPowerShell2019','machine')

setupEnv.ps1 downloads named modules in $array to $saveFolder. 
Then locates psd1-file and adds this as a enviroment variable with name in arrayobject. 
To use the module access env-variable with $env:name as showed in importModule_Example.ps1

References:
https://www.erwinmcm.com/running-the-various-versions-of-pnp-powershell-side-by-side/