add support for iteration field types

[kjswartz]

Description

• Add iteration types
• Update the graphql queries to return iteration field values and the iteration ids for setting new values
• this update will allow the user to set completedIterations in addition to the current and future iteration values available.
• resolves issue#54

Testing

I created a release in my fork pointing to my branch so action could be tested. You will need to setup a projectV2 with an iteration field type. Then create an issue and add it to the project. Here is an example workflow testing set, clear and get.

To test setting a completedIteration setup an iteration for dates in the past and then verify the iteration value is in the completed filter view for iterations. Then you can pass the value and verify it is set in the project board.

name: Update Project iteration field

on:
  issues:
    types: [closed, reopened]

jobs:
  update-project-field:
    name: Update Project Iteration field
    runs-on: ubuntu-latest
    steps:
      - name: Set project iteration field on close
        if: github.event.action == 'closed'
        uses: kjswartz/project-fields/@v1.0.0
        with:
          operation: set
          fields: '<ITERATION FIELD>'
          github_token: ${{ secrets.GITHUB_TOKEN }}
          project_url: 'https://github.com/orgs/<ORG>/projects/<NUMBER>'
          resource_url: 'https://github.com/${{ github.repository }}/issues/${{ github.event.issue.number }}'
          values: <VALID_VALUE>

      - name: Clear project iteration field on reopen
        if: github.event.action == 'reopened'
        uses: kjswartz/project-fields/@v1.0.0
        with:
          operation: clear
          fields: '<ITERATION FIELD>'
          github_token: ${{ secrets.GITHUB_TOKEN }}
          project_url: 'https://github.com/orgs/<ORG>/projects/<NUMBER>'
          resource_url: 'https://github.com/${{ github.repository }}/issues/${{ github.event.issue.number }}'
          
      - name: get project iteration field
        uses: kjswartz/project-fields/@v1.0.0
        id: get-field
        with:
          operation: get
          fields: '<ITERATION FIELD>'
          github_token: ${{ secrets.GITHUB_TOKEN }}
          project_url: 'https://github.com/orgs/<ORG>/projects/<NUMBER>'
          resource_url: 'https://github.com/${{ github.repository }}/issues/${{ github.event.issue.number }}'
        
      - name: write output
        run: echo ${{ steps.get-field.outputs.values }}

[EndBug]

Looks nice! I've tested this now and it seems to work well :)
I'm going to merge and release now so we can close this for good

[EndBug]

@all-contributors please add @kjswartz for their dev contribution

[allcontributors]

@EndBug

I couldn't determine any contributions to add, did you specify any contributions?
Please make sure to use valid contribution names.

[EndBug]

@all-contributors please add @kjswartz for their code contribution

[allcontributors]

@EndBug

I've put up a pull request to add @kjswartz! 🎉