Adds a package-validation.ts module, plus adds a call to the validation
step in the compilers.
Rearranges the kmc-package files to match other compilers better.
Removes `default` from exports.
And finally, adds ERROR_PackageCannotContainBothModelsAndKeyboards and
WARN_PackageShouldNotRepeatLanguages messages, plus tests.
Keyman makes it possible for you to type in any language on Windows, macOS, Linux, iPhone, iPad, Android tablets and phones, and even instantly in your web browser. Create keyboard layouts with Keyman Developer and share them with the community in the keyboards repository. The Keyman Community have already contributed keyboard layouts for over 2,000 languages!
License
Copyright (c) SIL International.
Keyman is an open source project distributed under the MIT license.