Bump logback-core from 1.2.0 to 1.2.9 in /ocpp-v2_0-test

Bumps logback-core from 1.2.0 to 1.2.9.

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

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

Author: dependabot[bot]

ocpp-v2_0-test/pom.xml

@@ -78,7 +78,7 @@
         <dependency>
             <groupId>ch.qos.logback</groupId>
             <artifactId>logback-core</artifactId>
-            <version>1.2.0</version>
+            <version>1.2.9</version>
             <scope>test</scope>
         </dependency>
         <dependency>