Bump ch.qos.logback:logback-classic from 1.4.4 to 1.4.12 (#27)

Bumps [ch.qos.logback:logback-classic](https://github.com/qos-ch/logback) from 1.4.4 to 1.4.12.
- [Commits](https://github.com/qos-ch/logback/compare/v_1.4.4...v_1.4.12)

---
updated-dependencies:
- dependency-name: ch.qos.logback:logback-classic
  dependency-type: direct:production
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
diff --git a/pom.xml b/pom.xml
index fb65341..8344c9e 100644
--- a/pom.xml
+++ b/pom.xml
@@ -78,7 +78,7 @@
 
         <junit.version>4.13.2</junit.version>
         <jmock.version>1.2.0</jmock.version>
-        <logback.version>1.4.4</logback.version>
+        <logback.version>1.4.12</logback.version>
         <mail.version>1.6.2</mail.version>
         <activation.version>1.1.1</activation.version>
         <mockito-core.version>3.0.0</mockito-core.version>