Bump lumberjack from 1.2.10 to 1.3.1

---
updated-dependencies:
- dependency-name: lumberjack
  dependency-version: 1.3.1
  dependency-type: indirect
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -251,7 +251,7 @@ GEM
     loofah (2.24.1)
       crass (~> 1.0.2)
       nokogiri (>= 1.12.0)
-    lumberjack (1.2.10)
+    lumberjack (1.3.1)
     mail (2.8.1)
       mini_mime (>= 0.1.1)
       net-imap