Update dependency org.apache.maven.plugins:maven-compiler-plugin to v3.15.0

Author: renovate[bot]

pom.xml

@@ -28,7 +28,7 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <maven.compiler.source>11</maven.compiler.source>
         <maven.compiler.target>11</maven.compiler.target>
-        <maven-compiler-plugin.version>3.13.0</maven-compiler-plugin.version>
+        <maven-compiler-plugin.version>3.15.0</maven-compiler-plugin.version>
         <maven-coveralls-plugin.version>4.3.0</maven-coveralls-plugin.version>
         <maven-deploy-plugin.version>3.1.2</maven-deploy-plugin.version>
         <maven-cobertura-plugin.version>2.7</maven-cobertura-plugin.version>