Bump multidict from 4.7.1 to 4.7.2
Bump multidict from 4.7.1 to 4.7.2

Bumps [multidict](https://github.com/aio-libs/multidict) from 4.7.1 to 4.7.2.
- [Release notes](https://github.com/aio-libs/multidict/releases)
- [Changelog](https://github.com/aio-libs/multidict/blob/master/CHANGES.rst)
- [Commits](https://github.com/aio-libs/multidict/compare/v4.7.1...v4.7.2)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
aio-libs/sockjs