chore(deps): bump syn from 1.0.83 to 1.0.84 (#742)

Bumps [syn](https://github.com/dtolnay/syn) from 1.0.83 to 1.0.84.
- [Release notes](https://github.com/dtolnay/syn/releases)
- [Commits](https://github.com/dtolnay/syn/compare/1.0.83...1.0.84)

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

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

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

Cargo.lock

@@ -3273,9 +3273,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "1.0.83"
+version = "1.0.84"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "23a1dfb999630e338648c83e91c59a4e9fb7620f520c3194b6b89e276f2f1959"
+checksum = "ecb2e6da8ee5eb9a61068762a32fa9619cc591ceb055b3687f4cd4051ec2e06b"
 dependencies = [
  "proc-macro2",
  "quote",

ethers-core/Cargo.toml

@@ -36,7 +36,7 @@ cargo_metadata = { version = "0.14.1", optional = true }
 
 # eip712 feature enabled dependencies
 convert_case = { version = "0.4.0", optional = true }
-syn = { version = "1.0.83", optional = true }
+syn = { version = "1.0.84", optional = true }
 quote = { version = "1.0.9", optional = true }
 proc-macro2 = { version = "1.0.33", optional = true }