Error: Completion callback never invoked w/v0.11.0 + request

Nobody has claimed this yet.

I'm opening a new issue based on @springmeyer's [comment](https://github.com/mapbox/node-pre-gyp/issues/367#issuecomment-405969068) on #367.

Here's what I'm seeing when issuing an `npm rebuild`:

```
$ npm rebuild --update-binary --target_arch=x64 --target_platform=linux
node-pre-gyp WARN Using request for node-pre-gyp https download
node-pre-gyp ERR! Completion callback never invoked!
node-pre-gyp ERR! System Darwin 18.2.0
node-pre-gyp ERR! command "/private/var/tmp/_bazel_rohansingh/649b503783f1008804e854e38f7f4c52/external/nodejs/bin/nodejs/bin/node" "/private/var/tmp/_bazel_rohansingh/649b503783f1008804e854e38f7f4c52/execroot/hustle/bazel-out/darwin-fastbuild/genfiles/backend/npm_backend/node_modules/bcrypt/node_modules/.bin/node-pre-gyp" "install" "--fallback-to-build"
node-pre-gyp ERR! cwd /private/var/tmp/_bazel_rohansingh/649b503783f1008804e854e38f7f4c52/execroot/hustle/bazel-out/darwin-fastbuild/genfiles/backend/npm_backend/node_modules/bcrypt
node-pre-gyp ERR! node -v v10.13.0
node-pre-gyp ERR! node-pre-gyp -v v0.11.0
node-pre-gyp ERR! This is a bug in `node-pre-gyp`.
node-pre-gyp ERR! Try to update node-pre-gyp and file an issue if it does not help:
node-pre-gyp ERR!
npm ERR! code ELIFECYCLE
npm ERR! errno 6
npm ERR! bcrypt@3.0.2 install: `node-pre-gyp install --fallback-to-build`
npm ERR! Exit status 6
npm ERR!
npm ERR! Failed at the bcrypt@3.0.2 install script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
```

This is actually running in [Bazel](https://bazel.build), but I've disabled Bazel's sandboxing and checked that tools like `curl` work in the same context.

Start by reproducing the `npm rebuild --update-binary --target_arch=x64 --target_platform=linux` command with node-pre-gyp v0.11.0 and the request-based download path shown in the log. Trace where the completion callback should be invoked; done means the rebuild completes without `Completion callback never invoked!` or the resulting lifecycle failure.

Written by the indexing model from the issue text.