CI build with GitHub Actions instead of Travis

.github/workflows/build.yml

@@ -0,0 +1,65 @@
+# Github action performing the following operations:
+# - Define an environment variable STOREPASS=password
+# - Build the Maven project with Java 8, Java 11 and Java 17 as a matrix. The JDK is provided by Temurin
+# - As a post build step, run the tests and upload test coverage to Coveralls.
+
+name: build
+
+on:
+  push:
+    branches: [ '*' ]
+  pull_request:
+    branches: [ master ]
+
+env:
+  STOREPASS: password
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        java: [ 8, 11, 17 ]
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Set up Java ${{ matrix.java }}
+        uses: actions/setup-java@v3
+        with:
+          java-version: ${{ matrix.java }}
+          distribution: 'temurin'
+          cache: 'maven'
+
+      - name: Compile
+        run: |
+          mvn -version
+          mvn -B clean compile
+
+      - name: Tests
+        run: mvn -B test
+
+      - name: Packaging
+        run: mvn -B package -DskipTests
+
+      - name: Coverage report
+        run: mvn -B clean test jacoco:report-aggregate coveralls:report -DjacocoReports=jsign/target/site/jacoco-aggregate/jacoco.xml -DrepoToken=${{ secrets.COVERALLS_TOKEN }} || true
+
+  experimental:
+    runs-on: ubuntu-latest
+    needs: build
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Set up Java 20
+        uses: actions/setup-java@v3
+        with:
+          java-version: 20
+          distribution: 'temurin'
+          cache: 'maven'          
+
+      - name: Build
+        run: |
+          mvn -version
+          mvn -B clean package || true

README.md

@@ -1,7 +1,7 @@
 Jsign - Java implementation of Microsoft Authenticode
 =====================================================
 
-[![Build Status](https://api.travis-ci.com/ebourg/jsign.svg)](https://app.travis-ci.com/github/ebourg/jsign)
+[![Build Status](https://github.com/ebourg/jsign/actions/workflows/build.yml/badge.svg?branch=master&event=push)](https://github.com/ebourg/jsign/actions/workflows/build.yml)
 [![Coverage Status](https://coveralls.io/repos/github/ebourg/jsign/badge.svg?branch=master)](https://coveralls.io/github/ebourg/jsign?branch=master)
 [![License](https://img.shields.io/badge/license-Apache--2.0-blue.svg)](https://www.apache.org/licenses/LICENSE-2.0)
 [![Maven Central](https://img.shields.io/maven-central/v/net.jsign/jsign.svg)](https://search.maven.org/#search%7Cga%7C1%7Cg%3A%22net.jsign%22)