build(deps): bump slog-term from 2.5.0 to 2.6.0

Bumps [slog-term](https://github.com/slog-rs/term) from 2.5.0 to 2.6.0.
- [Release notes](https://github.com/slog-rs/term/releases)
- [Changelog](https://github.com/slog-rs/term/blob/master/CHANGELOG.md)
- [Commits](https://github.com/slog-rs/term/commits)

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

Author: dependabot-preview[bot]

Cargo.lock

@@ -43,7 +43,7 @@ strum = "0.18.0"
 strum_macros = "0.18.0"
 slog-async = "2.5.0"
 slog-envlogger = "2.1.0"
-slog-term = "2.5.0"
+slog-term = "2.6.0"
 petgraph = "0.5.1"
 tiny-keccak = "1.5.0"
 tokio = { version = "0.2.21", features = ["stream", "rt-threaded", "rt-util", "blocking", "time", "sync", "macros", "test-util"] }