Bump commons-configuration2 from 2.7 to 2.8.0 (#1121)

Bumps commons-configuration2 from 2.7 to 2.8.0.

---
updated-dependencies:
- dependency-name: org.apache.commons:commons-configuration2
  dependency-type: direct:production
...

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diff --git a/pom.xml b/pom.xml
index 4f7fba1..aaa8efe 100644
--- a/pom.xml
+++ b/pom.xml
@@ -139,7 +139,7 @@
       <dependency>
         <groupId>org.apache.commons</groupId>
         <artifactId>commons-configuration2</artifactId>
-        <version>2.7</version>
+        <version>2.8.0</version>
       </dependency>
       <dependency>
         <groupId>org.apache.commons</groupId>