Add action for publishing to Forge

name: Build and publish to Puppet Forge

on:

 push:

  tags:

      - v[0-9]+.[0-9]+.[0-9]+

jobs:

  build:

    runs-on: ubuntu-latest

    steps:

    - name: Get latest tag

      id: vars

      run: echo ::set-output name=tag::${GITHUB_REF:10}

    - name: Clone repository

      uses: actions/checkout@v2

      with:

        ref: ${{ steps.vars.outputs.tag }}

    - name: Build and publish module

      uses: barnumbirr/action-forge-publish@v2.8.0

      env:

       FORGE_API_KEY: ${{ secrets.FORGE_API_KEY }}

       REPOSITORY_URL: https://forgeapi.puppet.com/v3/releases