This rule is quite helpful in avoiding hard-to-debug missing `await`s.
Note: there are two locations in `src/main.ts` that trigger warnings:
the `run()` and the `cleanup()` function are called without `await` and
without any `.catch()` clause.
In the initial version of https://github.com/actions/checkout/pull/379,
this was addressed by adding `.catch()` clauses. However, it was
determined that this is boilerplate code that will need to be fixed in a
broader way.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
