Bump serde-generate from 0.2.0 to 0.2.1
Bump serde-generate from 0.2.0 to 0.2.1

Bumps [serde-generate](https://github.com/facebookincubator/serde-reflection) from 0.2.0 to 0.2.1.
- [Release notes](https://github.com/facebookincubator/serde-reflection/releases)
- [Commits](https://github.com/facebookincubator/serde-reflection/commits)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
Closes: #4601
Approved by: rexhoffman

aptos-labs/aptos-core,aptos-labs/aptos-core,libra/libra,libra/libra,aptos-labs/aptos-core,aptos-labs/aptos-core,aptos-labs/aptos-core,libra/libra,libra/libra,aptos-labs/aptos-core,aptos-labs/aptos-core,libra/libra