(dbatools, dbatools-library.powershell) Fixes Missing Dependency

[JPRuskin]

Description

Adds the dbatools-library.powershell package, updates dbatools to have a dependency on it.

Additionally, fixes module installation when a package is using package fix version notation, as importing the module would fail when it installed using the package version.

Motivation and Context

DbaTools was missing the required DbaTools.Library module. This fixes the install so that it will import correctly!

How Has this Been Tested?

• Tested on Windows 10 Sandbox

Types of changes

• [x] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• ~[ ] Breaking change (fix or feature that would cause existing functionality to change)~

Checklist:

• [x] My code follows the code style of this repository (if your change does not follow the style it will likely be rejected - this includes changes in formatting / layout).
• ~[ ] My change requires a change to the documentation (this usually means the notes in the description of a package) and I have updated the documentation accordingly.~
• ~[ ] I have updated the package description and it is less than 4000 characters.~
• [x] The added / modified package passed install / uninstall in the chocolatey test environment.
• ~[ ] The changes only affect a single package (not including meta package).~

[pauby]

@JPRuskin Thanks for PR'ing this. I need to apologise as when we were speaking about it this never occurred to me and only now, seeing it written down, it does.

.library is not a supported extension. dbatools-library.powershell would be a better name.

[pauby]

@JPRuskin awesome work! Thanks for your contribution!