build(deps): bump maven-compiler-plugin from 3.2 to 3.8.1

Bumps [maven-compiler-plugin](https://github.com/apache/maven-compiler-plugin) from 3.2 to 3.8.1.
- [Release notes](https://github.com/apache/maven-compiler-plugin/releases)
- [Commits](apache/maven-compiler-plugin@maven-compiler-plugin-3.2...maven-compiler-plugin-3.8.1)

Author: dependabot-preview[bot]

pom.xml

@@ -178,7 +178,7 @@
                     <target>1.8</target>
                     <encoding>UTF-8</encoding>
                 </configuration>
-                <version>3.2</version>
+                <version>3.8.1</version>
             </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>