Update Apache Commons Lang 3.4 to 3.6.

Author: garydgregory

pom.xml

@@ -47,7 +47,7 @@ CSV files of various types.
     <dependency>
       <groupId>org.apache.commons</groupId>
       <artifactId>commons-lang3</artifactId>
-      <version>3.4</version>
+      <version>3.6</version>
       <scope>test</scope>
     </dependency>
     <dependency>