Add CI for publish and version checks. #1

	name: Check Package Version in PR

	on:
	pull_request:
	branches:
	- main
	paths:
	- 'packages/snap/**'

	jobs:
	check_version:
	runs-on: ubuntu-latest

	steps:
	- name: Checkout code
	uses: actions/checkout@v2
	with:
	fetch-depth: 0
	- name: "create-main-branch"
	run: "git branch --track main origin/main"

	- name: Get version from main branch
	id: get_version_main
	run: echo "::set-output name=version::$(git show HEAD~1:package.json \| grep '"version":' \| cut -d '"' -f 4)"

	- name: Get version from PR branch
	id: get_version_pr
	run: echo "::set-output name=version::$(grep '"version":' package.json \| cut -d '"' -f 4)"

	- name: Compare versions and prevent merging if the same
	run: \|
	if [ "${{ steps.get_version_main.outputs.version }}" == "${{ steps.get_version_pr.outputs.version }}" ]; then
	echo "Error: Versions in main branch and PR are the same - please upgrade version in PR."
	exit 1
	else
	echo "Versions are different, allowing merge"
	echo "::set-output name=version_changed::true"
	fi

Provide feedback