Show Maven stack traces on errors in GH CI
diff --git a/.github/workflows/maven.yml b/.github/workflows/maven.yml
index a55f0cf..b9f3512 100644
--- a/.github/workflows/maven.yml
+++ b/.github/workflows/maven.yml
@@ -58,6 +58,6 @@
         distribution: 'temurin'
         java-version: ${{ matrix.java }}
     - name: Build with Maven
-      run: mvn --show-version --batch-mode --no-transfer-progress install -D"maven.javadoc.skip=true" -D"org.slf4j.simpleLogger.log.org.apache.maven.cli.transfer.Slf4jMavenTransferListener=warn"
+      run: mvn --errors --show-version --batch-mode --no-transfer-progress install -D"maven.javadoc.skip=true" -D"org.slf4j.simpleLogger.log.org.apache.maven.cli.transfer.Slf4jMavenTransferListener=warn"
     - name: Generate jacoco:report
-      run: mvn --show-version --batch-mode --no-transfer-progress jacoco:report # coveralls:report
+      run: mvn --errors --show-version --batch-mode --no-transfer-progress jacoco:report # coveralls:report