(universal-usb-installer) Treat trailing character as a additional version number

[AdmiringWorm]

Description

This pull request updates the automatic updater to treat any trailing character
as its own number to be appended to the last version part, this allows us to
create a new package version even when the software developer has created
a new version without using a pure version number.

ref #2187

Motivation and Context

To have a working automatic updater

How Has this Been Tested?

1. Run .\update_all.ps1 universal-usb-installer
2. Verify it updated to 2.0.1.4100 (those last zeros are the fix version part)

Screenshot (if appropriate, usually isn't needed):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Migrated package (a package has been migrated from another repository)

Checklist:

• My code follows the code style of this repository.
• My change requires a change to documentation (this usually means the notes in the description of a package).
• I have updated the documentation accordingly (this usually means the notes in the description of a package).
• I have updated the package description and it is less than 4000 characters.
• All files are up to date with the latest Contributing Guidelines
• The added/modified package passed install/uninstall in the chocolatey test environment (Not changing any package scripts).
• The changes only affect a single package (not including meta package).

[AppVeyorBot]

✅ Package verification completed without issues. PR is now pending human review

[JPRuskin]

Looks good!

The code works to update a package today, but the current version isn't one that would be affected by the code change. Running through it, it seems like it should work.