Update reqwest requirement from 0.11 to 0.12

Updates the requirements on [reqwest](https://github.com/seanmonstar/reqwest) to permit the latest version.
- [Release notes](https://github.com/seanmonstar/reqwest/releases)
- [Changelog](https://github.com/seanmonstar/reqwest/blob/master/CHANGELOG.md)
- [Commits](seanmonstar/reqwest@v0.11.0...v0.12.0)

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

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

client/Cargo.toml

@@ -18,7 +18,7 @@ futures = "0.3"
 http = { version = "0.2", optional = true }
 js-sys = { version = "0.3", optional = true }
 log = "0.4"
-reqwest = { version = "0.11", optional = true, features = ["json"] }
+reqwest = { version = "0.12", optional = true, features = ["json"] }
 serde = "1.0"
 serde_json = "1.0"
 thiserror = "1.0"