Upgrade to maven-surefire-plugin 2.22.2

Closes gh-239

Author: philwebb

pom.xml

@@ -158,7 +158,7 @@
 				<plugin>
 					<groupId>org.apache.maven.plugins</groupId>
 					<artifactId>maven-surefire-plugin</artifactId>
-					<version>2.22.1</version>
+					<version>2.22.2</version>
 					<configuration>
 						<includes>
 							<include>**/*Tests.java</include>