chore(deps): bump syn from 1.0.103 to 1.0.104 (#1901)

Bumps [syn](https://github.com/dtolnay/syn) from 1.0.103 to 1.0.104.
- [Release notes](https://github.com/dtolnay/syn/releases)
- [Commits](https://github.com/dtolnay/syn/compare/1.0.103...1.0.104)

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

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

Cargo.lock

@@ -3918,9 +3918,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "1.0.103"
+version = "1.0.104"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a864042229133ada95abf3b54fdc62ef5ccabe9515b64717bcb9a1919e59445d"
+checksum = "4ae548ec36cf198c0ef7710d3c230987c2d6d7bd98ad6edc0274462724c585ce"
 dependencies = [
  "proc-macro2",
  "quote",

ethers-core/Cargo.toml

@@ -40,7 +40,7 @@ cargo_metadata = { version = "0.15.2", optional = true }
 
 # eip712 feature enabled dependencies
 convert_case = { version = "0.6.0", optional = true }
-syn = { version = "1.0.103", optional = true }
+syn = { version = "1.0.104", optional = true }
 proc-macro2 = { version = "1.0.47", optional = true }
 
 [dev-dependencies]