Migrate CI/CD from Travis to GitHub Actions, fix checkstyle compatibility, update plugin versions, remove Eclipse cruft

Author: 1tmb

.classpath

@@ -0,0 +1,11 @@
+version: 2
+updates:
+  - package-ecosystem: "maven"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"

.github/dependabot.yml

@@ -0,0 +1,27 @@
+name: CI
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-java@v4
+        with:
+          java-version: '8'
+          distribution: 'corretto'
+      - name: Build and test
+        env:
+          CI: true
+          COVERALLS_REPO_TOKEN: ${{ secrets.COVERALLS_REPO_TOKEN }}
+        run: |
+          if [ -n "$COVERALLS_REPO_TOKEN" ]; then
+            mvn clean test jacoco:report coveralls:report
+          else
+            mvn clean test
+          fi

.github/workflows/ci.yml

@@ -0,0 +1,27 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - 'catatumbo-*'
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-java@v4
+        with:
+          java-version: '8'
+          distribution: 'corretto'
+          server-id: ossrh
+          server-username: OSSRH_USERNAME
+          server-password: OSSRH_TOKEN
+          gpg-private-key: ${{ secrets.GPG_PRIVATE_KEY }}
+          gpg-passphrase: GPG_PASSPHRASE
+      - name: Publish to Maven Central
+        env:
+          OSSRH_USERNAME: ${{ secrets.OSSRH_USERNAME }}
+          OSSRH_TOKEN: ${{ secrets.OSSRH_TOKEN }}
+          GPG_PASSPHRASE: ${{ secrets.GPG_PASSPHRASE }}
+        run: mvn deploy -P release -DskipTests

.github/workflows/release.yml

@@ -1,2 +1,7 @@
 /target/
 .DS_Store
+.idea/
+.settings/
+.project
+.classpath
+.java-version