Github actions has depricated Node 12 support, please upgrade to node 16

[fage88]

Is your feature request related to a problem? Please describe.
Github action workflows have started outputting messaging around actions that are still Node 12 which fell out of support in April 2022.

In this blog post github outlines their plan to deprecate and remove Node 12 support
https://github.blog/changelog/2022-09-22-github-actions-all-actions-will-begin-running-on-node16-instead-of-node12/

Describe the solution you'd like
I'd like to see the slack action upgraded to node 16 so these warnings go away

[JinoArch]

+1. I am also facing the same issue. Hope to see this change soon.

[molayadev]

Hi

PR #251

I created a PR to support node16 hoping to be reviewed and merged soon.

@satterly
Check it, possibly it's ready to merge 😁

[satterly]

I have published a new release... https://github.com/act10ns/slack/releases/tag/v2.0.0

Note that as per the recommendation of GitHub (see link above) is it a new Major release so if you currently specify v1 you will now need to modify your Github action to point to v2.

Example

- uses: act10ns/slack@v2
  with: 
    status: ${{ job.status }}
  if: always()