Merge pull request #1262 from kubernetes-client/dependabot/maven/com.diffplug.spotless-spotless-maven-plugin-2.3.1

Bump spotless-maven-plugin from 2.1.0 to 2.3.1

Author: k8s-ci-robot

.github/workflows/maven.yml

@@ -10,6 +10,17 @@ on:
     branches: [ master ]
 
 jobs:
+  verify-format:
+    runs-on: ubuntu-latest
+    name: Verify Source Format
+    steps:
+      - uses: actions/checkout@v2
+      - name: Setup Java
+        uses: actions/setup-java@v1
+        with:
+          java-version: 8.0.x
+      - name: Verify Format and License
+        run: mvn spotless:check
   build:
     runs-on: ubuntu-latest
     name: Java ${{ matrix.java }} Maven Test
@@ -23,8 +34,6 @@ jobs:
         uses: actions/setup-java@v1
         with:
           java-version: ${{ matrix.java }}
-      - name: Verify Format and License
-        run: mvn spotless:check
       - name: Build with Maven
         run: mvn -q test -B -Dorg.slf4j.simpleLogger.log.org.apache.maven.cli.transfer.Slf4jMavenTransferListener=warn
   build-graalvm:

pom.xml

@@ -334,7 +334,7 @@
       <plugin>
         <groupId>com.diffplug.spotless</groupId>
         <artifactId>spotless-maven-plugin</artifactId>
-        <version>2.1.0</version>
+        <version>2.3.1</version>
         <configuration>
           <formats>
             <format>