build: bump futures from 0.3.28 to 0.3.29

Bumps [futures](https://github.com/rust-lang/futures-rs) from 0.3.28 to 0.3.29.
- [Release notes](https://github.com/rust-lang/futures-rs/releases)
- [Changelog](https://github.com/rust-lang/futures-rs/blob/master/CHANGELOG.md)
- [Commits](rust-lang/futures-rs@0.3.28...0.3.29)

---
updated-dependencies:
- dependency-name: futures
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Cargo.lock

@@ -53,7 +53,7 @@ cursive_core = "0.3.7"
 eden_dag = { package = "esl01-dag", version = "0.3.0" }
 eyre = "0.6.8"
 fslock = "0.2.1"
-futures = "0.3.28"
+futures = "0.3.29"
 git-branchless-hook = { version = "0.8.0", path = "git-branchless-hook" }
 git-branchless-init = { version = "0.8.0", path = "git-branchless-init" }
 git-branchless-invoke = { version = "0.8.0", path = "git-branchless-invoke" }