Update syn requirement from 1.0 to 2.0 (#179)

* Update syn requirement from 1.0 to 2.0

Updates the requirements on [syn](https://github.com/dtolnay/syn) to permit the latest version.
- [Release notes](https://github.com/dtolnay/syn/releases)
- [Commits](https://github.com/dtolnay/syn/commits/2.0.31)

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

Signed-off-by: dependabot[bot] <[email protected]>

* Update changelog

Signed-off-by: dependabot[bot] <[email protected]>

---------

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

CHANGELOG.md

@@ -9,6 +9,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 - Bumps `sysinfo` from 0.28.0 to 0.29.0
 - Bumps `serde_with` from ~2 to ~3
 - Bumps `itertools` from 0.10.0 to 0.11.0
+- Bumps `syn` from 1.0 to 2.0
 
 ### Changed
 - Moved @aditjind to Emeritus maintainers ([#170](https://github.com/opensearch-project/opensearch-rs/pull/170))

yaml_test_runner/Cargo.toml

@@ -30,7 +30,7 @@ serde = "1"
 serde_yaml = "0.9"
 serde_json = { version = "1", features = ["arbitrary_precision"] }
 simple_logger = "4.0.0"
-syn = { version = "1.0", features = ["full"] }
+syn = { version = "2.0", features = ["full"] }
 sysinfo = "0.29"
 url = "2.1.1"
 tar = "0.4"