Bump org.apache.bcel:bcel from 6.7.0 to 6.8.1

Bumps [org.apache.bcel:bcel](https://github.com/apache/commons-bcel) from 6.7.0 to 6.8.1.
- [Changelog](https://github.com/apache/commons-bcel/blob/master/RELEASE-NOTES.txt)
- [Commits](apache/commons-bcel@rel/commons-bcel-6.7.0...rel/commons-bcel-6.8.1)

---
updated-dependencies:
- dependency-name: org.apache.bcel:bcel
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

pom.xml

@@ -301,7 +301,7 @@
 			<dependency>
 				<groupId>org.apache.bcel</groupId>
 				<artifactId>bcel</artifactId>
-				<version>6.7.0</version>
+				<version>6.8.1</version>
 			</dependency>
 			<dependency>
 				<groupId>com.github.nbauma109</groupId>