chore(cargo): bump log from 0.4.20 to 0.4.21

Bumps [log](https://github.com/rust-lang/log) from 0.4.20 to 0.4.21.
- [Release notes](https://github.com/rust-lang/log/releases)
- [Changelog](https://github.com/rust-lang/log/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rust-lang/log/compare/0.4.20...0.4.21)

---
updated-dependencies:
- dependency-name: log
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

deltachat-repl/Cargo.toml

@@ -9,7 +9,7 @@ ansi_term = "0.12.1"
 anyhow = "1"
 deltachat = { path = "..", features = ["internals"]}
 dirs = "5"
-log = "0.4.20"
+log = "0.4.21"
 pretty_env_logger = "0.5"
 rusqlite = "0.31"
 rustyline = "13"