Bump ch.qos.logback:logback-classic from 1.0.13 to 1.3.12

Bumps [ch.qos.logback:logback-classic](https://github.com/qos-ch/logback) from 1.0.13 to 1.3.12.
- [Commits](qos-ch/logback@v_1.0.13...v_1.3.12)

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

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

pom.xml

@@ -18,7 +18,7 @@
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 		<!-- versioning -->
 		<slf4j.version>1.7.12</slf4j.version>
-		<logback.version>1.0.13</logback.version>
+		<logback.version>1.3.12</logback.version>
 		<jetty-utils.version>0.4.2.v20200516</jetty-utils.version>
 		<canl.version>2.6.0</canl.version>
 		<voms-api-java.version>3.3.2</voms-api-java.version>