Bump ch.qos.logback:logback-classic from 1.2.3 to 1.2.13 (#8)

Bumps [ch.qos.logback:logback-classic](https://github.com/qos-ch/logback) from 1.2.3 to 1.2.13.
- [Commits](https://github.com/qos-ch/logback/compare/v_1.2.3...v_1.2.13)

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

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diff --git a/pom.xml b/pom.xml
index 8fa20bf..5c33bbc 100644
--- a/pom.xml
+++ b/pom.xml
@@ -129,7 +129,7 @@
         <dependency>
             <groupId>ch.qos.logback</groupId>
             <artifactId>logback-classic</artifactId>
-            <version>1.2.3</version>
+            <version>1.2.13</version>
             <scope>test</scope>
         </dependency>
         <dependency>