Support for multiple tags and extra args

• Rename tag input to tags, to allow you to push multiple tags of the same image.
• Add input extra_args to append arbitrary arguments to the podman push
• Rename registry-path output to registry-paths, which is a JSON-parseable array containing all registry paths of the pushed image. The size of the output array is the number of tags that were pushed
• (Internal) Add test workflows to test build and push using multiple container CLIs (Podman and Docker)
• (Internal) Add CI checks to the action that includes ESlint, bundle verifier and IO checker

Minor releases

v2.8

• Update action to run on Node20. https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/

v2.7

• Update action to run on Node16. https://github.blog/changelog/2022-05-20-actions-can-now-run-in-a-node-js-16-runtime/

v2.6

• Make image and tag in lowercase, if found in uppercase. #54
• Remove kubic packages from the test workflows. redhat-actions/buildah-build#93

v2.5.1

• README update

v2.5: Image manifest support

• Allow pushing image manifest.

v2.4.1

• Fix bug when pushing multiple tags. #57

v2.4: Allow fully qualified image names in tags input

• Allow fully qualified image names in tags input, for compatibility with docker/metadata-action. #50
• Fix issue where image pulled from Docker storage would overwrite image in Podman storage 733d8e9

v2.3: Update log messages and README

• Warn users if input image and registry both has / in it's name.
• Update README to better explain inputs image and registry

v2.2: Make input username and password optional

• Make input username and password optional, so that user can skip these inputs if they are already logged in to container image registry.

v2.1: Support to output single registry path

• Add output registy-path to output first element of registry-paths
• Print image digest after every push to verify image digest for each tag
• Print podman version at start of the action to verify that required version is being used
• (Internal) Add Link checker workflow to identify dangling links