Build script fails on errors from Pester and Update-Help

[sdwheeler]

The build script is outdated which presents the following problems:

• The script install the latest version of Pester (5.x) but the Pester tests are written for v4.x syntax.
• The script runs Update-Help for all installed help. However, there are known issues with help for certain modules. Update-Help throws errors for those modules which causes the build script to exit.

To fix this:

• Change the script to install Pester 4.10.1
• Change the Update-Help command to only update help for the modules needed by the Pester tests.

Also, the Pester tests need to be rewritten. See #498 for more detail.

[sdwheeler]

This issue is fixed in PR #497.

[theJasonHelmick]

No longer applies with Microsoft.PowerShell.PlatyPS v1.0