Show Maven stack traces on errors in GH CI
diff --git a/.github/workflows/maven.yml b/.github/workflows/maven.yml
index 805f340..ef45970 100644
--- a/.github/workflows/maven.yml
+++ b/.github/workflows/maven.yml
@@ -49,4 +49,4 @@
         distribution: 'temurin'
         java-version: ${{ matrix.java }}
     - name: Build with Maven
-      run: mvn --show-version --batch-mode --no-transfer-progress
+      run: mvn --errors --show-version --batch-mode --no-transfer-progress