Update CI config

- Travis CI - remove Java 7
- update build badge to GitHub Actions

Author: slachiewicz

.travis.yml

@@ -8,10 +8,9 @@ addons:
 
 language: java
 jdk:
-  - openjdk7
   - openjdk8
   - openjdk11
-#  - openjdk12 add once code is requires Java 7
+  - openjdk16
 
 dist: trusty
 

README.md

@@ -1,7 +1,7 @@
 Plexus-Utils
 ============
 
-[![Build Status](https://travis-ci.org/codehaus-plexus/plexus-utils.svg?branch=master)](https://travis-ci.org/codehaus-plexus/plexus-utils)
+[![Build Status](https://github.com/codehaus-plexus/plexus-utils/actions/workflows/maven.yml/badge.svg)](https://github.com/codehaus-plexus/plexus-utils/actions)
 [![Maven Central](https://img.shields.io/maven-central/v/org.codehaus.plexus/plexus-utils.svg?label=Maven%20Central)](http://search.maven.org/artifact/org.codehaus.plexus/plexus-utils)
 
 This library is historically used by the Apache Maven project so it's developed and maintained by the same [`bad guys`](http://maven.apache.org/team.html)