Bump ch.qos.logback:logback-classic from 1.2.9 to 1.2.13 (#32)

Bumps [ch.qos.logback:logback-classic](https://github.com/qos-ch/logback) from 1.2.9 to 1.2.13.
- [Commits](https://github.com/qos-ch/logback/compare/v_1.2.9...v_1.2.13)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
diff --git a/pom.xml b/pom.xml
index d7e59e6..ed31fd1 100644
--- a/pom.xml
+++ b/pom.xml
@@ -45,7 +45,7 @@
   <properties>
     <findbugs.maxRank>12</findbugs.maxRank>
     <hadoop.version>2.6.5</hadoop.version>
-    <logback.version>1.2.9</logback.version>
+    <logback.version>1.2.13</logback.version>
     <maven.compiler.release>8</maven.compiler.release>
     <maven.compiler.source>1.8</maven.compiler.source>
     <maven.compiler.target>1.8</maven.compiler.target>