Auto-Merge Flag to Limit to Minor/Patch Updates

[austins]

🚀 Feature Proposal

Add an optional input flag (i.e. target) to only auto-merge on major, minor, patch updates based on Semantic Versioning.

• Default value would be major.
• Setting to minor would include both minor and patch updates.
• Setting to patch would only auto-merge on patch updates.

Motivation

Major updates may have breaking changes. Being able to auto-merge to only minor or patch updates will allow PRs for major versions to be manually approved and merged.

Example

steps:
  - uses: fastify/github-action-merge-dependabot@v2.1.1
    with:
      github-token: ${{ secrets.GITHUB_TOKEN }}
      target: minor

[fahric]

• Add a new optional flag called target and set default value to major
• work out the semantic version of the PR (ex from title) and compare the target flag
• only call api if the flag and the PR version match
• add tests

[austins]

Thank you!