Upgrade commons-lang3 to 3.7

This is part of the push to upgrade all dependencies to JDK 9
compatible versions. This particular upgrade is necessary to make
use of the Automatic-Module-Name entries added to Commons Lang in
version 3.6.

Affects jgrapht#448

pom.xml

@@ -110,7 +110,7 @@
 			<dependency>
 				<groupId>org.apache.commons</groupId>
 				<artifactId>commons-lang3</artifactId>
-				<version>3.5</version>
+				<version>3.7</version>
 			</dependency>
 		</dependencies>
 	</dependencyManagement>