Adds minVersion to findPackageConfig and findPackageConfigVersion which allows ignoring earlier versions (which currently only means ignoring version 1, aka. .packages files.)
Changes the version number of SimplePackageConfig.empty to the current maximum version.
Improve file read performance; improve lookup performance.
Emit an error when a package is inside the package root of another package.
Fix a link in the readme.
relativeRoot property to Package which controls whether to make the root URI relative when writing a configuration file.Package constructor not accepting relative packageUriRoot.package_config.json over a specified .packages..packages derived package configuration, and default all such packages to language version 2.7.dart:io from entrypoints that are supposed to be cross-platform compatible.FilePackagesDirectoryPackages.getBase(..) performance improvements.Uri).