Bump logback-classic from 1.1.3 to 1.2.0

Bumps logback-classic from 1.1.3 to 1.2.0.

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

pom.xml

@@ -24,7 +24,7 @@
         <version.org.fenixedu.fenixedu.commons>3.0.0</version.org.fenixedu.fenixedu.commons>
         <version.org.jasig.cas.client.core>3.4.1</version.org.jasig.cas.client.core>
         <version.org.springframework.spring.webmvc>4.3.18.RELEASE</version.org.springframework.spring.webmvc>
-        <version.ch.qos.logback.logback.classic>1.1.3</version.ch.qos.logback.logback.classic>
+        <version.ch.qos.logback.logback.classic>1.2.0</version.ch.qos.logback.logback.classic>
         <version.com.google.code.gson.gson>2.6.1</version.com.google.code.gson.gson>
         <version.com.google.guava.guava>27.0-jre</version.com.google.guava.guava>
         <version.com.mitchellbosecke.pebble>2.3.0</version.com.mitchellbosecke.pebble>