Office365DnsChecker version 1.1.0

It's been a while, hasn't it? Here's what I've been working on.

New Features and Enhancements

Added online help. You can pull this up with Get-Help -Online.
Add support for checking DNS records for Office 365 hosted by 21Vianet. Add the -Use21Vianet parameter, where supported.
The Azure AD client configuration record check now passes if the msoid record is missing. As of early 2023, this DNS record is only required to be set when Office 365 is managed by 21Vianet.

On a small number of configurations, DNS resolution would enter an infinite loop. This would happen if you were running macOS or Linux, and had an alternative implementation of Resolve-DnsName. Now, the only cmdlet we'll use is DnsClient (if present) before falling back to the built-in DNS resolver. I first noticed this in v1.0.4, but it may have been present since the beginning.
Converted all help files from SAPIEN to platyPS for ease of maintenance.
Ignore PSScriptAnalyzer warnings about plural nouns. Our nouns are intentionally plural when appropriate.
Renamed the default branch from master to main.

Full Changelog: v1.0.3...v1.1.0