1.3.0

In this release:

• Support for self.version and replace composer settings and constraints,
  which are now correctly considered and substituted with their actual versions.
• A new PackageVersions\Versions::ROOT_PACKAGE_NAME constant, which is
  populated with the name of the root package, if available.
• Dropped support for PHP 7.0: please upgrade to PHP 7.1
• Improved mutation testing

Total issues resolved: 5

• 55: Consider adding Versions::getRootPackageVersion() thanks to @rybakit
• 56: Expose root package name thanks to @rybakit
• 57: Support Composers "replaces" config, important for CI in mono repos thanks to @ostrolucky
• 58: Bump dependencies, improve mutation testing thanks to @Ocramius
• 59: Parse self.version in replaced packages thanks to @Jean85