Bump commons-parent from 48 to 51 (apache#42)

Bumps commons-parent from 48 to 51.

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Author: dependabot[bot]

pom.xml

@@ -19,7 +19,7 @@
   <parent>
     <groupId>org.apache.commons</groupId>
     <artifactId>commons-parent</artifactId>
-    <version>48</version>
+    <version>51</version>
   </parent>
   <modelVersion>4.0.0</modelVersion>
   <groupId>commons-cli</groupId>