Test Multiple Versions of openapi-generator-maven-plugin in GitHub Actions (#464)

Testing multiple versions of `openapi-generator-maven-plugin` during GitHub checks.

Author: Chrimle

.github/workflows/maven.yml

@@ -20,14 +20,14 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        java: [ 17, 21 ]
+        openapi-generator-maven-plugin-version: [ 7.14.0, 7.13.0, 7.12.0, 7.11.0 ]
     steps:
     - uses: actions/checkout@v4
     - name: Set up JDK
       uses: actions/setup-java@v4
       with:
-        java-version: ${{ matrix.java }}
+        java-version: '17'
         distribution: 'temurin'
         cache: maven
-    - name: Build with Maven
-      run: mvn -B package --no-transfer-progress --file pom.xml
+    - name: Maven Build - openapi-generator-maven-plugin:${{ matrix.openapi-generator-maven-plugin-version }}
+      run: mvn -B package --no-transfer-progress --file pom.xml -Dopenapi-generator-maven-plugin.version=${{ matrix.openapi-generator-maven-plugin-version }}