:arrow_up: Update enum_dispatch requirement from 0.1 to 0.2
:arrow_up: Update enum_dispatch requirement from 0.1 to 0.2

Updates the requirements on [enum_dispatch](https://gitlab.com/antonok/enum_dispatch) to permit the latest version.
- [Release notes](https://gitlab.com/antonok/enum_dispatch/tags)
- [Commits](https://gitlab.com/antonok/enum_dispatch/commits/master)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
aisk/rust-memcache,aisk/rust-memcache