this.provider.request(...).then(...).return is not a function

[kuindji]

TypeError: this.provider.request(...).then(...).return is not a function
      at Assets.listStackResources (..../node_modules/serverless-s3-deploy/index.js:86:12)
      at Assets.deployS3 (..../node_modules/serverless-s3-deploy/index.js:143:17)
      at Assets.afterDeploy (..../node_modules/serverless-s3-deploy/index.js:69:19)

With assets: auto: true

Serverless version: 2.25.1

[GavL89]

I had this issue with the latest versions of serverless (2.28.3) and serverless-s3-deploy 0.9.0. Upping the package version to 0.10.0 resolved the issue for me.