cargo: update toml to version 0.5

No code changes necessary.

Author: mgeisler

Cargo.toml

@@ -24,7 +24,7 @@ codecov = { repository = "mgeisler/version-sync" }
 pulldown-cmark = { version = "0.4", default-features = false }
 semver-parser = "0.9"
 syn = { version = "0.15", features = ["full"] }
-toml = "0.4"
+toml = "0.5"
 url = "1.5.1"
 itertools = "0.8"
 regex = "1.1"