Working towards #3545.
formatVersion() does not belong in VersionParser since it depends upon a
Package object, and is creating a more complete pretty formatted
version, not parsing anything.
The new getFullPrettyVersion() method can be seen as an extension to
getPrettyVersion(), and is located in BasePackage as a result.
Callers to VersionParser::formatVersion() were not updated in this
commit to demonstrate that no functionality was changed in this
refactor. They will be updated in a follow up commit.
99dab8aebd