Bump bcel from 6.0 to 6.6.0 in /rules-java/api

Bumps bcel from 6.0 to 6.6.0.

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

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

rules-java/api/pom.xml

@@ -22,7 +22,7 @@
         <dependency>
             <groupId>org.apache.bcel</groupId>
             <artifactId>bcel</artifactId>
-            <version>6.0</version>
+            <version>6.6.0</version>
         </dependency>
         <dependency>
             <groupId>commons-validator</groupId>