Invoke-Build.ArgumentCompleters

The script registers Invoke-Build completers for parameters Task and File.

Completers can be used with:

* PowerShell v5 native Register-ArgumentCompleter
Simply invoke Invoke-Build.ArgumentCompleters.ps1, e.g. in a profile.

* TabExpansionPlusPlus https://github.com/lzybkr/TabExpansionPlusPlus
Put Invoke-Build.ArgumentCompleters.ps1 to the TabExpansionPlusPlus module
directory in order to be loaded automatically. Or invoke it after importing
the module, e.g. in a profile.

* TabExpansion2.ps1 https://www.powershellgallery.com/packages/TabExpansion2
Put Invoke-Build.ArgumentCompleters.ps1 to the path in order to be loaded
automatically on the first completion. Or invoke after TabExpansion2.ps1,
e.g. in a profile.