Update 5.3.x to current dependencies and support Java 11

.github/workflows/build-pull-request.yaml

@@ -0,0 +1,33 @@
+name: Build Pull Request
+on: pull_request
+
+env:
+  MOZ_HEADLESS: true
+
+jobs:
+  build:
+    name: Build pull request
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        java: [ 8, 11, 17 ]
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-java@v3
+        with:
+          distribution: temurin
+          java-version: ${{ matrix.java }}
+
+      - name: Setup Firefox
+        uses: browser-actions/setup-firefox@v1
+
+      - name: Setup GeckoDriver
+        uses: browser-actions/setup-geckodriver@latest
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Setup Gradle
+        uses: gradle/gradle-build-action@v2
+
+      - name: Build with Gradle
+        run: ./gradlew -Dci=true --no-daemon --continue build

.travis.yml

@@ -0,0 +1,24 @@
+language: java
+
+jdk:
+  - openjdk8
+  - openjdk11
+
+before_install:
+  - "/sbin/start-stop-daemon --start --quiet --pidfile /tmp/custom_xvfb_99.pid --make-pidfile --background --exec /usr/bin/Xvfb -- :99 -ac -screen 0 1280x1024x16"
+  - "export DISPLAY=:99.0"
+
+install: /bin/true
+script: ./gradlew -Dci=true build --info
+after_failure:
+  - cat */build/test-results/TEST-*.xml
+
+cache:
+  directories:
+  - $HOME/.gradle
+  - $HOME/.m2/repository/webdriver
+
+sudo: false
+
+addons:
+  firefox: "24.8.1esr"