The NumPy 1.18 release is currently in development. Please check the numpy/doc/release/upcoming_changes/ folder for upcoming release notes. The numpy/doc/release/upcoming_changes/README.txt details how to add new release notes.
numpy/doc/release/upcoming_changes/
numpy/doc/release/upcoming_changes/README.txt
For the work in progress release notes for the current development version, see the devdocs.