Bump checkstyle to 13.0.0

https://checkstyle.org/releasenotes.html#Release_12.2.0
https://checkstyle.org/releasenotes.html#Release_12.3.0
https://checkstyle.org/releasenotes.html#Release_12.3.1
https://checkstyle.org/releasenotes.html#Release_13.0.0

JIRA: LIGHTY-415
Signed-off-by: tobias.pobocik <tobias.pobocik@pantheon.tech>

Author: Tobianas

lighty-core/lighty-parent/pom.xml

@@ -192,7 +192,7 @@
                             <groupId>com.puppycrawl.tools</groupId>
                             <artifactId>checkstyle</artifactId>
                             <!-- This should match the dependency management on com.puppycrawl.tools:checkstyle above -->
-                            <version>12.1.2</version>
+                            <version>13.2.0</version>
                         </dependency>
                         <dependency>
                             <groupId>com.github.sevntu-checkstyle</groupId>