Build/CI: Modernize build.yml (#235)

* Test on more Java versions
* Remove travis.yml; unused

Author: dsmiley

.github/workflows/build.yml

@@ -1,21 +1,35 @@
 # This workflow will build a Java project with Maven
-# For more information see: https://help.github.com/actions/language-and-framework-guides/building-and-testing-java-with-maven
+# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-java-with-maven
 
 name: Java CI with Maven
 
-on: [ push, pull_request ]
+on:
+  push:
+    branches: [ main, master ]
+  pull_request:
+    branches: [ main, master ]
 
 jobs:
   build:
     runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        java: [ '8', '11' ]
 
     steps:
-      - uses: actions/checkout@v2
-      - name: Set up JDK 8
-        uses: actions/setup-java@v2
+      - uses: actions/checkout@v4
+      - name: Set up JDK ${{ matrix.java }}
+        uses: actions/setup-java@v4
         with:
-          java-version: '8'
-          distribution: 'adopt'
+          java-version: ${{ matrix.java }}
+          distribution: 'temurin'
           cache: maven
       - name: Build with Maven
-        run: mvn --batch-mode --update-snapshots verify
+        run: mvn --batch-mode --update-snapshots verify
+
+      - name: Publish Test Results
+        if: always()
+        uses: EnricoMi/publish-unit-test-result-action@v2
+        with:
+          files: target/surefire-reports/*.xml