Update .travis.yml
Update .travis.yml

Additional parameters and > /dev/null
mojavelinux/asciidoctor-gradle-examples,mojavelinux/asciidoctor-gradle-examples,rwinch/asciidoctor-gradle-examples,ysb33r/asciidoctor-gradle-examples,sputnik27/asciidoctor-gradle-examples,kubamarchwicki/asciidoctor-gradle-examples,danhyun/asciidoctor-gradle-examples,achimgrimm/asciidoctor-gradle-examples,sputnik27/asciidoctor-gradle-examples,danhyun/asciidoctor-gradle-examples,kubamarchwicki/asciidoctor-gradle-examples,achimgrimm/asciidoctor-gradle-examples,ysb33r/asciidoctor-gradle-examples,rwinch/asciidoctor-gradle-examples