(GH-1623) Change $host.Version to $PSVersionTable.PSVersion

[MaxBurgert]

With the latest release of Powershell, this line throws an SetValueInvocationException: "The requested security protocol is not supported."
Change the SecurityProtocol to SystemDefault ensures backwards compatibility and is necessary since Ssl3 is deprecated.

Fixes GH-1623

[MaxBurgert]

You're right, this was not the issue.
The issue was with Visual Studio Code, which returned for $host.Version not the actual PowerShell version, whereby a comparison with $PSVersionTable.PSVersion will result in the expected behaviour.
I've updated the title of the PR.
With cfdadc6, the comparison is done in the appropriate way as The Scripting Guys mentioned here.

[ferventcoder]

Looks like all of the other places were already fixed up - thanks for catching this. Rebased to stable and merged into stable at d43e9fd

[ferventcoder]

Thanks for the contribution!