build(deps): bump bcel from 6.3.1 to 6.6.0 in /jdbl-core

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] <support@github.com>

jdbl-core/pom.xml

@@ -56,7 +56,7 @@
       <dependency>
          <groupId>org.apache.bcel</groupId>
          <artifactId>bcel</artifactId>
-         <version>6.3.1</version>
+         <version>6.6.0</version>
          <scope>compile</scope>
       </dependency>