chore(deps): bump ethabi from `c622438` to `6f18e11` (#853)

Bumps [ethabi](https://github.com/rust-ethereum/ethabi) from `c622438` to `6f18e11`.
- [Release notes](https://github.com/rust-ethereum/ethabi/releases)
- [Commits](c622438f9f...6f18e11621)

---
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

@@ -1081,7 +1081,7 @@ dependencies = [
 [[package]]
 name = "ethabi"
 version = "16.0.0"
-source = "git+https://github.com/rust-ethereum/ethabi?branch=master#c622438f9fd2ac2f9b3c38ecb1ca760c069d9ec2"
+source = "git+https://github.com/rust-ethereum/ethabi?branch=master#6f18e11621d29b6cd978ef39b48fa572b823bb80"
 dependencies = [
  "ethereum-types",
  "hex",