added github actions badges, removed Travis badge

Author: chrjohn

README.md

@@ -1,7 +1,7 @@
 QuickFIX/J
 ==========
-
-[![Build Status](https://travis-ci.com/quickfix-j/quickfixj.svg?branch=master)](https://travis-ci.com/quickfix-j/quickfixj)
+[![Java CI](https://github.com/quickfix-j/quickfixj/actions/workflows/maven.yml/badge.svg)](https://github.com/quickfix-j/quickfixj/actions/workflows/maven.yml)
+[![CodeQL](https://github.com/quickfix-j/quickfixj/actions/workflows/codeql-analysis.yml/badge.svg)](https://github.com/quickfix-j/quickfixj/actions/workflows/codeql-analysis.yml)
 [![Maven Central](https://maven-badges.herokuapp.com/maven-central/org.quickfixj/quickfixj-core/badge.svg)](https://maven-badges.herokuapp.com/maven-central/org.quickfixj/quickfixj-core)
 [![Total alerts](https://img.shields.io/lgtm/alerts/g/quickfix-j/quickfixj.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/quickfix-j/quickfixj/alerts/)
 [![Language grade: Java](https://img.shields.io/lgtm/grade/java/g/quickfix-j/quickfixj.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/quickfix-j/quickfixj/context:java)