Bump toml from 0.4.10 to 0.5.8

Bumps [toml](https://github.com/alexcrichton/toml-rs) from 0.4.10 to 0.5.8.
- [Release notes](https://github.com/alexcrichton/toml-rs/releases)
- [Commits](toml-rs/toml-rs@0.4.10...0.5.8)

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

Author: dependabot[bot]

Cargo.lock

@@ -14,7 +14,7 @@ chrono = { version = "0.4", features = ["serde"] }
 lazy_static = "1.1"
 lettre = { version = "0.10.0-rc.3", features = ["builder", "smtp-transport"] }
 urlencoding = "1.0"
-toml = "0.4"
+toml = "0.5"
 rand = "0.8"
 regex = "1.0"
 rocket = "0.4.2"