5.0.1
Version 5.0.1 has been released for the deprecated angularfire2 NPM library; this simply re-exports everything from @angular/fire; allowing you to use either angularfire2 or @angular/fire in your imports and package.json.
It will have it's dependency pinned to the corresponding minor and will be released alongside future @angular/fire releases for the rest of the 5.x series.