初始化项目提交，并添加 flowable 7 的 dm 兼容

.github/workflows/maven.yml

@@ -0,0 +1,30 @@
+# This workflow will build a Java project with Maven, and cache/restore any dependencies to improve the workflow execution time
+# For more information see: https://help.github.com/actions/language-and-framework-guides/building-and-testing-java-with-maven
+
+name: Java CI with Maven
+
+on:
+  push:
+    branches: [ master ]
+  # pull_request:
+  #   branches: [ master ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        java: [ '8', '11', '17' ]
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up JDK ${{ matrix.Java }}
+      uses: actions/setup-java@v2
+      with:
+        java-version: ${{ matrix.java }}
+        distribution: 'temurin'
+        cache: maven
+    - name: Build with Maven
+      run: mvn -B package --file pom.xml -Dmaven.test.skip=true