chore(deps): bump secp256k1 from 0.27.0 to 0.29.0

Bumps [secp256k1](https://github.com/rust-bitcoin/rust-secp256k1) from 0.27.0 to 0.29.0.
- [Changelog](https://github.com/rust-bitcoin/rust-secp256k1/blob/master/CHANGELOG.md)
- [Commits](rust-bitcoin/rust-secp256k1@secp256k1-0.27.0...secp256k1-0.29.0)

---
updated-dependencies:
- dependency-name: secp256k1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Cargo.lock

@@ -20,7 +20,7 @@ anyhow = { workspace = true, features = ["backtrace"] }
 serde = { workspace = true, features = ["derive"] }
 lightning-invoice = "0.30.0"
 bitcoin = { version = "0.30.2", default-features = false }
-secp256k1 = { version = "0.27.0", default-features = false, features = ["recovery", "alloc", "rand"] }
+secp256k1 = { version = "0.29.0", default-features = false, features = ["recovery", "alloc", "rand"] }
 testcontainers = { workspace = true }
 testcontainers-modules = { workspace = true, features = ["postgres"] }
 bitcoincore-rpc = { workspace = true }