Merge branch 'master' into refactor/TwinPrimeAndStringCompression

Author: siriak

pom.xml

@@ -107,7 +107,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-checkstyle-plugin</artifactId>
-                <version>3.4.0</version>
+                <version>3.5.0</version>
                 <configuration>
                     <configLocation>checkstyle.xml</configLocation>
                     <consoleOutput>true</consoleOutput>