Bump bcel from 6.3.1 to 6.6.0

Bumps bcel from 6.3.1 to 6.6.0.

---
updated-dependencies:
- dependency-name: org.apache.bcel:bcel
  dependency-type: direct:production
...

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

Author: dependabot[bot]

pom.xml

@@ -198,7 +198,7 @@
             <dependency>
                 <groupId>org.apache.bcel</groupId>
                 <artifactId>bcel</artifactId>
-                <version>6.3.1</version>
+                <version>6.6.0</version>
             </dependency>
 
             <!-- own artifacts -->