Update bitcoin requirement from =0.28 to =0.29 in /relayer (informals…

…ystems#2555)

* Update bitcoin requirement from =0.28 to =0.29 in /relayer

Updates the requirements on [bitcoin](https://github.com/rust-bitcoin/rust-bitcoin) to permit the latest version.
- [Release notes](https://github.com/rust-bitcoin/rust-bitcoin/releases)
- [Changelog](https://github.com/rust-bitcoin/rust-bitcoin/blob/master/CHANGELOG.md)
- [Commits](rust-bitcoin/rust-bitcoin@0.28.0...0.28.1)

---
updated-dependencies:
- dependency-name: bitcoin
  dependency-type: direct:production
...

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

* Fix feature name

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Romain Ruetschi <romain@informal.systems>

relayer/Cargo.toml

@@ -41,7 +41,7 @@ futures = "0.3.23"
 crossbeam-channel = "0.5.5"
 k256 = { version = "0.11.4", features = ["ecdsa-core", "ecdsa", "sha256"]}
 hex = "0.4"
-bitcoin = { version = "=0.28", features = ["use-serde"] }
+bitcoin = { version = "0.29.1", features = ["serde"] }
 tiny-bip39 = "1.0.0"
 hdpath = { version = "0.6.1" }
 sha2 = "0.10.2"