configure github actions

Author: anatawa12

.github/dependabot.yml

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+version: 2
+updates:
+  - package-ecosystem: "gradle"
+    directory: "/" # Location of package manifests
+    open-pull-requests-limit: 0
+    schedule:
+      interval: "daily"

.github/workflows/gradle.yml

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+name: Java CI with Gradle
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up JDK 8
+        uses: actions/setup-java@v2
+        with:
+          distribution: 'temurin'
+          java-version: '8'
+
+      - name: Cache multiple paths
+        uses: actions/cache@v2
+        with:
+          path: |
+            ~/.gradle/caches
+            ./.gradle
+            ./buildSrc/build
+            ./build
+          key: ${{ runner.os }}
+      - name: Build with Gradle
+        run: ./gradlew --stacktrace build
+      - name: stop daemon
+        run: ./gradlew --stop

.github/workflows/release.yml

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+name: Publisher
+"on":
+  - workflow_dispatch
+jobs:
+  build:
+    environment: deployment
+    runs-on: ubuntu-latest
+    env:
+      RELEASER_CHANGER: gradle-properties
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+          token: "${{ secrets.ACTIONS_PAT }}"
+      - name: Set up JDK 11
+        uses: actions/setup-java@v2
+        with:
+          distribution: 'temurin'
+          java-version: '8'
+      - uses: anatawa12/something-releaser@v2
+
+      - run: set-git-user anatawa12-bot
+
+      - name: Update Version
+        id: up
+        run: |
+          # set current version
+          VERSION="$(get-version)"
+          if ! [[ "$VERSION" = *-SNAPSHOT ]]; then
+            echo 'VERSION IS NOT SNAPSHOT' >&2
+            exit 1
+          fi
+          VERSION="$(version-unsnapshot "$VERSION")"
+          set-version "$VERSION"
+          # create changelog
+          generate-changelog -v "$VERSION"
+          # create changelog for this release
+          RELEASE_NOTE="$(mktemp)"
+          echo "::set-output name=RELEASE_NOTE::$RELEASE_NOTE"
+          generate-changelog -v "$VERSION" --unreleased-only >> "$RELEASE_NOTE"
+          # update versions in readme and example
+          perl -pi \
+            -e 's/(?<=\Q("com.anatawa12.compile-time-constant") version \E)".*"/"'$VERSION'"/' \
+            README.md \
+            example/build.gradle.kts
+          # commit & tag
+          git add .
+          git commit -m "v$VERSION"
+          git tag "v$VERSION"
+
+      - run: |
+          ./gradlew build
+          git push && git push --tags
+      - name: Create New Release
+        env:
+          GH_TOKEN: ${{ github.token }}
+          RELEASE_NOTE: ${{ steps.up.outputs.RELEASE_NOTE }}
+        run: |
+          VERSION="$(get-version)"
+          gh release create "v$VERSION" \
+            --target "v$VERSION" \
+            --notes-file "$RELEASE_NOTE"
+          gh release upload "v$VERSION" \
+            "build/libs/plugin-permissions-for-ngt-$VERSION.jar"
+
+      - name: Update To Next Version
+        run: |
+          VERSION="$(get-version)"
+          VERSION="$(version-next "$VERSION")"
+          set-version "$(version-snapshot "$VERSION")"
+          git add .
+          git commit -m "prepare for next version: $VERSION"
+          git push