Add release automation

.github/workflows/generate-changelog.yaml

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+name: Generate new release changelog
+on:
+  push:
+    branches:
+      - master
+  repository_dispatch:
+    types: generate-pr
+  schedule:
+    - cron: '0 2 * * *'
+jobs:
+  createPullRequest:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+      - run: git fetch --depth=1 origin +refs/tags/*:refs/tags/*
+      - uses: actions/setup-node@v1
+        with:
+          node-version: '10.x'
+      - name: Update dependencies
+        run: npm install -g standard-version
+      - name: Generate changelog
+        run: |
+          standard-version
+      - run: git checkout "${GITHUB_REF:11}"
+      - name: Create Pull Request
+        id: cpr
+        uses: peter-evans/create-pull-request@v2
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          labels: chore
+          team-reviewers: terraform-google-modules/cft-admins
+          commit-message: 'chore(release): generate CHANGELOG for new version'
+          title: '[Release] New version notes'
+          body: |
+            Update changelog with information on next version.
+          branch: chore/changelog-generation
+      - name: Check outputs
+        run: |
+          echo "Pull Request Number - ${{ env.PULL_REQUEST_NUMBER }}"
+          echo "Pull Request Number - ${{ steps.cpr.outputs.pr_number }}"

.github/workflows/release.yaml

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+name: Create Release
+on:
+  push:
+    branches:
+      - master
+  repository_dispatch:
+    types: generate-pr
+jobs:
+  build:
+    name: Create Release
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+      - run: git fetch --depth=1 origin +refs/tags/*:refs/tags/*
+      - name: read changelog
+        run: cat CHANGELOG.md | grep -o -P "\d\.\d\.\d" | head -n 1
+      - name: find release
+        id: find_version
+        run: |
+          VERSION=$(cat CHANGELOG.md | grep -o -P "\d\.\d\.\d" | head -n 1)
+          TAG=$(git describe --abbrev=0 --tags)
+          echo "::set-output name=version::v$VERSION"
+          echo "::set-output name=tag::$TAG"
+      - name: Check outputs
+        run: |
+          echo "Version Number - ${{ steps.find_version.outputs.version }}"
+          echo "Latest Tag - ${{ steps.find_version.outputs.tag }}"
+      - name: Create Release
+        id: create_release
+        if: steps.find_version.outputs.tag != steps.find_version.outputs.version
+        uses: actions/create-release@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          tag_name: ${{ steps.find_version.outputs.version }}
+          release_name: Release ${{ steps.find_version.outputs.version }}
+          body: |
+            Release ${{ steps.find_version.outputs.version }}
+          draft: false
+          prerelease: false

.versionrc.json

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+{
+    "skip": {
+        "commit": true,
+        "tag": true
+    }
+}