[issue/#52] Fix maven deployment during travis CI pipeline

pom.xml

@@ -422,11 +422,27 @@
 			<id>release</id>
 			<build>
 				<plugins>
+					<plugin>
+						<groupId>org.apache.maven.plugins</groupId>
+						<artifactId>maven-deploy-plugin</artifactId>
+						<configuration>
+							<skip>true</skip>
+						</configuration>
+					</plugin>
 					<plugin>
 						<groupId>org.sonatype.plugins</groupId>
 						<artifactId>nexus-staging-maven-plugin</artifactId>
 						<version>1.6.8</version>
 						<extensions>true</extensions>
+						<executions>
+							<execution>
+								<id>default-deploy</id>
+								<phase>deploy</phase>
+								<goals>
+									<goal>deploy</goal>
+								</goals>
+							</execution>
+						</executions>
 						<configuration>
 							<serverId>sonatype</serverId>
 							<nexusUrl>https://oss.sonatype.org/</nexusUrl>