Include helper gh commands for managing the github releases

Author: adithyaov

dev/MAINTAINING.md

@@ -158,6 +158,8 @@
           package version (`git tag vX.Y.Z && git push -f origin vX.Y.Z`).
         * Add to stackage (`build-constraints.yaml` in Stackage repo) if needed
         * Optionally upload `package-X.Y.Z-sdist.tar.gz` to github release page
+            * `gh release create vX.Y.Z --title "vX.Y.Z"`
+            * `gh release upload vX.Y.Z package-X.Y.Z-sdist.tar.gz`
             * Update release contributors on github release page
               (`git shortlog -s prev_tag..new_tag | sed $'s/^[0-9 \t]*/* /' | sort -f`)
         * Update and if needed release streaming-benchmarks package