Update Apache Commons Lang 3.4 to 3.6.

Author: garydgregory

pom.xml

@@ -450,7 +450,7 @@ CSV files of various types.
         <dependency>
           <groupId>org.apache.commons</groupId>
           <artifactId>commons-lang3</artifactId>
-          <version>3.4</version>
+          <version>3.6</version>
         </dependency>
       </dependencies>