Update coveralls plugin for code coverage analysis. (#194)

Author: tswast

pom.xml

@@ -78,7 +78,7 @@ limitations under the License.
       <plugin>
         <groupId>org.eluder.coveralls</groupId>
         <artifactId>coveralls-maven-plugin</artifactId>
-        <version>3.1.0</version>
+        <version>4.1.0</version>
         <configuration>
           <coberturaReports>
             <coberturaReport>${basedir}/target/coverage.xml</coberturaReport>