2.5.4: Bump twisted from 19.2.1 to 19.7.0 (#20)
Bumps [twisted](https://github.com/twisted/twisted) from 19.2.1 to 19.7.0. - [Release notes](https://github.com/twisted/twisted/releases) - [Changelog](https://github.com/twisted/twisted/blob/trunk/NEWS.rst) - [Commits](https://github.com/twisted/twisted/compare/twisted-19.2.1...twisted-19.7.0) Signed-off-by: dependabot[bot] <support@github.com>