fix: include `package.schema.json` in dist artefacts and npm package
fix: include `package.schema.json` in dist artefacts and npm package

DavidParks8/ng-packagr,DavidParks8/ng-packagr,DavidParks8/ng-packagr,dherges/ng-packagr,dherges/ng-packagr,dherges/ng-packagr,dherges/ng-packagr,DavidParks8/ng-packagr