chore(deps): bump ethabi from `6f18e11` to `321a651` (#891)

Bumps [ethabi](https://github.com/rust-ethereum/ethabi) from `6f18e11` to `321a651`.
- [Release notes](https://github.com/rust-ethereum/ethabi/releases)
- [Commits](6f18e11621...321a651e76)

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

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Cargo.lock

@@ -1094,7 +1094,7 @@ dependencies = [
 [[package]]
 name = "ethabi"
 version = "16.0.0"
-source = "git+https://github.com/rust-ethereum/ethabi?branch=master#6f18e11621d29b6cd978ef39b48fa572b823bb80"
+source = "git+https://github.com/rust-ethereum/ethabi?branch=master#321a651e767d7dbe81e8606cbf42f08dedf58c2b"
 dependencies = [
  "ethereum-types",
  "hex",