.travis.settings.xml

<?xml version="1.0" encoding="UTF-8"?>
<settings xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.1.0 http://maven.apache.org/xsd/settings-1.1.0.xsd" xmlns="http://maven.apache.org/SETTINGS/1.1.0"
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">

    <profiles>
        <profile>
            <id>default</id>
            <activation>
                <activeByDefault>true</activeByDefault>
            </activation>
            <properties>
                <gpg.keyname>${env.SIGNING_GPG_PKEY}</gpg.keyname>
            </properties>
        </profile>
    </profiles>

    <servers>
        <server>
            <id>ossrh</id>
            <username>${env.SONATYPE_USERNAME}</username>
            <password>${env.SONATYPE_PASSWORD}</password>
        </server>
        <server>
            <id>gpg.passphrase</id>
            <passphrase>${env.SIGNING_GPG_PASSWORD}</passphrase>
        </server>
    </servers>
</settings>