build(deps-dev): update @types/express requirement (#1571)
build(deps-dev): update @types/express requirement (#1571)

Updates the requirements on [@types/express](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/express) to permit the latest version.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/express)
stryker-mutator/stryker,stryker-mutator/stryker,stryker-mutator/stryker