github workflow (action) to update dependencis

dependabot.yml

name: Update Dependencies
on:
  schedule:
    # https://crontab.guru/#0_0_*_*_WED,SAT
    # Run every Wednesday and Saturday at 00:00
    # 0 0 * * WED,SAT
    - cron: '0 0 * * WED,SAT'

jobs:
  dependabot:
    runs-on: ubuntu-latest
    name: Update Dependencies
    steps:
      - name: Checkout master
        uses: actions/checkout@master
      - name: Check outdated dependencies and prepare
        run: |
          git config user.name 'Dependabot'
          git config user.email 'dependabot@users.noreply.github.com'
          yarn outdated || yarn upgrade && git add . && git commit -m "Update Dependencies"
      - name: Create PR
        if: ${{ success() }}
        uses: peter-evans/create-pull-request@v3
        with:
          title: Update Dependencies
          body: |
           Automatic dependencies upgrade.

           Note: major version updates were not installed. After merging this PR run yarn outdate to see if there is any major version.
          branch: update-dependencies
          branch-suffix: timestamp
          delete-branch: true