Error when generating new `dist` version

I tried generating a new version with `npm run dist`, but I got:

```
$ npm run dist

> stackdriver-errors-js@0.8.0 dist /workspaces/stackdriver-errors-js
> gulp lib-concat

fs.js:45
} = primordials;
^

ReferenceError: primordials is not defined
at fs.js:45:5
at req_ (/workspaces/stackdriver-errors-js/node_modules/natives/index.js:143:24)
at Object.req [as require] (/workspaces/stackdriver-errors-js/node_modules/natives/index.js:55:10)
at Object. (/workspaces/stackdriver-errors-js/node_modules/vinyl-fs/node_modules/graceful-fs/fs.js:1:37)
at Module._compile (internal/modules/cjs/loader.js:1063:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:1092:10)
at Module.load (internal/modules/cjs/loader.js:928:32)
at Function.Module._load (internal/modules/cjs/loader.js:769:14)
at Module.require (internal/modules/cjs/loader.js:952:19)
at require (internal/modules/cjs/helpers.js:88:18)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! stackdriver-errors-js@0.8.0 dist: `gulp lib-concat`
npm ERR! Exit status 1
```

Reproduce the failure with npm run dist, which invokes the gulp lib-concat entry point shown in the report. Trace the incompatible dependency versions from the primordials error, then verify that the distribution command completes successfully and generates the dist version.

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