Update dependency org.apache.maven.plugins:maven-compiler-plugin to v3.12.1

Author: renovate[bot]

pom.xml

@@ -80,7 +80,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
-                <version>3.8.1</version>
+                <version>3.12.1</version>
                 <configuration>
                     <excludes>
                         <!-- package info files are only important for Javadocs -->