feat: 🎸 adiciona link direto para página de build do travis-ci

Ref.: #31

Author: rcmoutinho

README.asc

@@ -1,6 +1,6 @@
 = Guia Prático para Certificação: Atualize sua certificação Java 6 para Java 8
 
-image:https://img.shields.io/travis/com/duke-certification/java6-to-java8.svg[Travis (.com)] image:https://img.shields.io/github/release/duke-certification/java6-to-java8.svg[GitHub release] image:https://img.shields.io/github/release-date/duke-certification/java6-to-java8.svg[GitHub Release Date] image:https://img.shields.io/github/downloads/duke-certification/java6-to-java8/total.svg[GitHub All Releases] image:https://img.shields.io/github/issues/duke-certification/java6-to-java8.svg[GitHub issues] image:https://img.shields.io/github/license/duke-certification/java6-to-java8.svg[GitHub License]
+image:https://img.shields.io/travis/com/duke-certification/java6-to-java8.svg[Travis (.com), link=https://travis-ci.com/duke-certification/java6-to-java8] image:https://img.shields.io/github/release/duke-certification/java6-to-java8.svg[GitHub release] image:https://img.shields.io/github/release-date/duke-certification/java6-to-java8.svg[GitHub Release Date] image:https://img.shields.io/github/downloads/duke-certification/java6-to-java8/total.svg[GitHub All Releases] image:https://img.shields.io/github/issues/duke-certification/java6-to-java8.svg[GitHub issues] image:https://img.shields.io/github/license/duke-certification/java6-to-java8.svg[GitHub License]
 
 Este projeto serve como material de apoio na realização do exame *https://education.oracle.com/upgrade-to-java-se-8-ocp/pexam_1Z0-813[1Z0-813]* que atualiza qualquer profissional com certificação Java 6 ou inferior, para a versão 8. No momento desta documentação, o _voucher_ do exame custa R$ 597,00 no Brasil.