meta: notify slack when someone force pushes
Blocked by https://github.com/nodejs/admin/issues/551
Notify #nodejs-dev on the OpenJS Foundation slack when someone force-pushes, removing one manual step from force-pushing.
Checklist
-
make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
tests and/or benchmarks are included -
documentation is changed or added -
commit message follows commit guidelines