Update `@types/request` (#111)
Update `@types/request` (#111)

The update was needed to address a bug in `@types/request` that
caused compilation errors.

PR-URL: https://github.com/GoogleCloudPlatform/nodejs-docker/pull/111
GoogleCloudPlatform/nodejs-docker,GoogleCloudPlatform/nodejs-docker,dlorenc/nodejs-docker,dlorenc/nodejs-docker,dlorenc/nodejs-docker,GoogleCloudPlatform/nodejs-docker