Bump reqwest from 0.9.19 to 0.9.20 (#5598)

Bumps [reqwest](https://github.com/seanmonstar/reqwest) from 0.9.19 to 0.9.20.
- [Release notes](https://github.com/seanmonstar/reqwest/releases)
- [Changelog](https://github.com/seanmonstar/reqwest/blob/v0.9.20/CHANGELOG.md)
- [Commits](https://github.com/seanmonstar/reqwest/compare/v0.9.19...v0.9.20)

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

client/Cargo.toml

@@ -15,7 +15,7 @@ jsonrpc-core = "13.0.0"
 log = "0.4.8"
 rand = "0.6.5"
 rayon = "1.1.0"
-reqwest = "0.9.19"
+reqwest = "0.9.20"
 serde = "1.0.99"
 serde_derive = "1.0.99"
 serde_json = "1.0.40"