add UTF-8 sourceEncoding property (to fix build on Windows machines)

Author: deki

pom.xml

@@ -86,6 +86,7 @@
         <dependencyCheck.version>5.3.2</dependencyCheck.version>
         <jackson.version>2.12.0</jackson.version>
         <slf4j.version>1.7.30</slf4j.version>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     </properties>
 
     <dependencies>