Matrix build.

.github/workflows/build-action.yaml

@@ -8,6 +8,9 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        mavne_version: [3.8.1, 3.6.3, 3.5.4]
 
     steps:
       - uses: actions/checkout@v2
@@ -24,9 +27,7 @@ jobs:
         with:
           java-version: "8"
           distribution: "adopt"
-      - name: "Verify Java version"
-        run: java -version || java --version
       - uses: ./
         with:
-          maven-version: 3.8.1
+          maven-version: ${{ matrix.maven_version }
       - run: mvn -v

.gitignore

@@ -23,6 +23,7 @@ pids
 # IntelliIDEA
 .idea/
 *.iml
+
 # Husky
 .husky/