An in-range update of @types/express is breaking the build 🚨

## The devDependency [@types/express](https://github.com/DefinitelyTyped/DefinitelyTyped) was updated from `4.17.0` to `4.17.1`.

🚨 [View failing branch](https://github.com/coding-blocks/judge-api/compare/master...coding-blocks:greenkeeper%2F%40types%2Fexpress-4.17.1).

This version is **covered** by your **current version range** and after updating it in your project **the build failed**.

@types/express is a devDependency of this project. It **might not break your production code or affect downstream projects**, but probably breaks your build or test tools, which may **prevent deploying or publishing**.

Status Details

- ❌ **ci/circleci:** CircleCI is running your tests ([Details](https://circleci.com/gh/coding-blocks/judge-api/265?utm_campaign=vcs-integration-link&utm_medium=referral&utm_source=github-build-link)).
- ❌ **continuous-integration/travis-ci/push:** The Travis CI build could not complete due to an error ([Details](https://travis-ci.org/coding-blocks/judge-api/builds/573597000?utm_source=github_status&utm_medium=notification)).

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