Bump actions/setup-java from 2.1.0 to 2.5.0 (#71)

* Bump actions/setup-java from 2.1.0 to 2.5.0

Bumps [actions/setup-java](https://github.com/actions/setup-java) from 2.1.0 to 2.5.0.
- [Release notes](https://github.com/actions/setup-java/releases)
- [Commits](actions/setup-java@v2.1.0...v2.5.0)

---
updated-dependencies:
- dependency-name: actions/setup-java
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

* use cache

Signed-off-by: Olivier Lamy <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Olivier Lamy <[email protected]>

.github/workflows/maven.yml

@@ -34,20 +34,12 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v2
 
-      - name: Set up cache for ~./m2/repository
-        uses: actions/[email protected]
-        with:
-          path: ~/.m2/repository
-          key: maven-${{ matrix.os }}-java${{ matrix.java }}-${{ hashFiles('**/pom.xml') }}
-          restore-keys: |
-            maven-${{ matrix.os }}-java${{ matrix.java }}-
-            maven-${{ matrix.os }}-
-
       - name: Set up JDK
-        uses: actions/setup-java@v2.1.0
+        uses: actions/setup-java@v2.5.0
         with:
           distribution: 'adopt'
+          cache: 'maven'
           java-version: ${{ matrix.java }}
 
       - name: Build with Maven
-        run: mvn verify -e -B -V
+        run: mvn verify -e -B -V javadoc:javadoc