chore(deps): bump maven-compiler-plugin from 3.6.1 to 3.8.1 (#535)

Bumps [maven-compiler-plugin](https://github.com/apache/maven-compiler-plugin) from 3.6.1 to 3.8.1.
- [Release notes](https://github.com/apache/maven-compiler-plugin/releases)
- [Commits](apache/maven-compiler-plugin@maven-compiler-plugin-3.6.1...maven-compiler-plugin-3.8.1)

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

pom.xml

@@ -279,7 +279,7 @@
             <!-- Compile Phase -->
             <plugin>
                 <artifactId>maven-compiler-plugin</artifactId>
-                <version>3.6.1</version>
+                <version>3.8.1</version>
                 <configuration>
                     <source>1.7</source>
                     <target>1.7</target>