Create template with importing my gems

* https://github.com/kachick/ruby-ulid
* https://github.com/kachick/rspec-matchers-power_assert_matchers

The motivation is kachick/times_kachick#75

.editorconfig

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+root = true
+
+[*]
+end_of_line = lf
+charset = utf-8
+indent_style = space
+indent_size = 2
+trim_trailing_whitespace = true
+insert_final_newline = true

.github/dependabot.yml

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+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "daily"
+      time: "08:00"
+      timezone: "Asia/Tokyo"
+  - package-ecosystem: "bundler"
+    directory: "/"
+    schedule:
+      interval: "daily"
+      time: "08:00"
+      timezone: "Asia/Tokyo"
+    versioning-strategy: increase

.github/workflows/deploy_documents.yml

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+name: Deploy documents
+on:
+  push:
+    branches: [ main ]
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: '3.0'
+          bundler-cache: true # runs 'bundle install' and caches installed gems automatically
+      - name: git setting
+        run: |
+          git config --local user.email "[email protected]"
+          git config --local user.name "Kenichi Kamiya"
+      - name: Update YARD documents and deploy to GitHub Pages
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          DATE=`date +"%Y%m%d-%H%M-UTC"`
+          BRANCH_NAME="documents-$DATE"
+          git checkout -b "$BRANCH_NAME"
+          bundle exec yard --output-dir docs
+          git add docs
+          git commit -m 'Update YARD documents' docs
+          git push origin "$BRANCH_NAME":gh-pages --force

.github/workflows/lint.yml

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+# https://docs.github.com/ja/actions/reference/workflow-syntax-for-github-actions
+name: Lint
+on:
+  push:
+    branches:
+      - main
+    paths-ignore:
+      - 'docs/**'
+  pull_request: null # This enables to run on each PRs
+jobs:
+  rubocop:
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest]
+        # Due to https://github.com/actions/runner/issues/849, we have to use quotes for '3.0'
+        ruby: ['3.0']
+    runs-on: ${{ matrix.os }}
+    steps:
+    - uses: actions/checkout@v2
+    - uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: ${{ matrix.ruby }}
+        bundler-cache: true # runs 'bundle install' and caches installed gems automatically
+    - run: bundle exec rake rubocop

.github/workflows/test_behaviors.yml

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+# https://docs.github.com/ja/actions/reference/workflow-syntax-for-github-actions
+name: Test
+on:
+  push:
+    branches:
+      - main
+    paths-ignore:
+      - 'docs/**'
+      - 'benchmark/**'
+      - 'bin/**'
+      - 'scripts/**'
+      - 'sig/**'
+      - 'Steepfile'
+      - '**.md'
+      - '*LICENSE*'
+      - 'logo.png'
+      - '.yardopts'
+      - '.editorconfig'
+      - '.rubocop.yml'
+  pull_request:
+    paths-ignore:
+      - 'docs/**'
+      - 'benchmark/**'
+      - 'bin/**'
+      - 'scripts/**'
+      - 'sig/**'
+      - 'Steepfile'
+      - '**.md'
+      - '*LICENSE*'
+      - 'logo.png'
+      - '.yardopts'
+      - '.editorconfig'
+      - '.rubocop.yml'
+jobs:
+  test_behaviors:
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest]
+        # Due to https://github.com/actions/runner/issues/849, we have to use quotes for '3.0'
+        ruby: [2.5, 2.6, 2.7, '3.0', head]
+    runs-on: ${{ matrix.os }}
+    steps:
+    - uses: actions/checkout@v2
+    - uses: ruby/setup-ruby@v1
+      env:
+        BUNDLE_WITHOUT: development
+      with:
+        ruby-version: ${{ matrix.ruby }}
+        bundler-cache: true # runs 'bundle install' and caches installed gems automatically
+    - run: bundle exec rake test_behaviors

.github/workflows/test_signatures.yml

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+name: Signature - rbs & YARD
+on:
+  push:
+    branches:
+      - main
+    paths-ignore:
+      - 'docs/**'
+      - 'benchmark/**'
+      - 'bin/**'
+      - 'scripts/**'
+      - 'test/**'
+      - 'spec/**'
+      - 'logo.png'
+      - '.rubocop.yml'
+  pull_request:
+    paths-ignore:
+      - 'docs/**'
+      - 'benchmark/**'
+      - 'bin/**'
+      - 'scripts/**'
+      - 'test/**'
+      - 'spec/**'
+      - 'logo.png'
+      - '.rubocop.yml'
+jobs:
+  validate_signatures:
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest]
+        # Due to https://github.com/actions/runner/issues/849, we have to use quotes for '3.0'
+        ruby: ['3.0']
+    runs-on: ${{ matrix.os }}
+    steps:
+    - uses: actions/checkout@v2
+    - uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: ${{ matrix.ruby }}
+        bundler-cache: true # runs 'bundle install' and caches installed gems automatically
+    - run: bundle exec rake validate_signatures

.gitignore

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+/coverage/
+/pkg/
+/spec/reports/
+/test/tmp/
+/tmp/
+
+.rspec_status
+
+# Used by dotenv library to load environment variables.
+.env
+.env.production
+
+# Ignore Byebug command history file.
+.byebug_history
+
+## Documentation cache and generated files:
+/.yardoc/
+/_yardoc/
+/doc/
+/rdoc/
+
+## Environment normalization:
+/.bundle/
+/vendor/
+
+*.lock
+
+.DS_Store

.rspec

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+--color
+--require spec_helper