travis-settings.xml

<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0
                      http://maven.apache.org/xsd/settings-1.0.0.xsd">

	<servers>
		<server>
			<id>ossrh</id>
			<username>${env.SONATYPE_USERNAME}</username>
			<password>${env.SONATYPE_PASSWORD}</password>
		</server>
		 <server>
			 <id>${env.GPG_KEY}</id>
			 <passphrase>${env.GPG_PASSPHRASE}</passphrase>
		</server>
	</servers>
	<profiles>
		<profile>
			<activation>
				<activeByDefault>true</activeByDefault>
			</activation>
			<properties>
				<gpg.keyname>${env.GPG_KEY}</gpg.keyname>
			</properties>
		</profile>
	</profiles>
</settings>