Improve repository.

- add kokuwa checkstyle
- add dependabot
- add dependency documentation
- add code owners
- add codeql
- add license badge

.github/workflows/release.yaml

@@ -1,13 +1,12 @@
 name: Release
 
-"on":
-  workflow_dispatch: {}
+"on": workflow_dispatch
 
 jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           token: ${{ secrets.GIT_ACTION_TOKEN }}
       - uses: crazy-max/ghaction-import-gpg@v4
@@ -16,16 +15,17 @@ jobs:
           passphrase: ${{ secrets.GPG_PASSPHRASE }}
           git_user_signingkey: true
           git_commit_gpgsign: true
-      - uses: actions/setup-java@v2
+      - uses: actions/setup-java@v3
         with:
           distribution: temurin
           java-version: 11
+          cache: maven
           server-id: sonatype-nexus
           server-username: SERVER_USERNAME
           server-password: SERVER_PASSWORD
           gpg-private-key: ${{ secrets.GPG_PRIVATE_KEY }}
           gpg-passphrase: GPG_PASSPHRASE
-      - run: mvn -B dependency:go-offline -q
+      - run: mvn -B dependency:go-offline
       - run: mvn -B release:prepare
       - run: mvn -B release:perform
         env: