Build(deps-dev): Bump lumberjack from 1.2.8 to 1.2.9

Bumps [lumberjack](https://github.com/bdurand/lumberjack) from 1.2.8 to 1.2.9.
- [Release notes](https://github.com/bdurand/lumberjack/releases)
- [Changelog](https://github.com/bdurand/lumberjack/blob/master/CHANGELOG.md)
- [Commits](bdurand/lumberjack@v1.2.8...v1.2.9)

---
updated-dependencies:
- dependency-name: lumberjack
  dependency-type: indirect
  update-type: version-update:semver-patch
...

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

Gemfile.lock

@@ -213,7 +213,7 @@ GEM
     loofah (2.21.3)
       crass (~> 1.0.2)
       nokogiri (>= 1.12.0)
-    lumberjack (1.2.8)
+    lumberjack (1.2.9)
     mail (2.8.1)
       mini_mime (>= 0.1.1)
       net-imap