Bump xbean-reflect from 3.7 to 4.21

Bumps xbean-reflect from 3.7 to 4.21.

---
updated-dependencies:
- dependency-name: org.apache.xbean:xbean-reflect
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

pom.xml

@@ -44,7 +44,7 @@
     <scm.url>scm:git:[email protected]:codehaus-plexus/plexus-containers.git</scm.url>
     <classWorldsVersion>2.6.0</classWorldsVersion>
     <plexusUtilsVersion>3.1.1</plexusUtilsVersion>
-    <xbeanReflectVersion>3.7</xbeanReflectVersion>
+    <xbeanReflectVersion>4.21</xbeanReflectVersion>
     <mavenVersion>3.2.5</mavenVersion>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <javaVersion>7</javaVersion>