Add support for Shibarium #60

	# Run unit tests for smart contracts
	name: Smart Contract Unit Test CI

	on:
	pull_request:
	branches: [ main ]

	jobs:
	check:
	name: Check smart contract files
	outputs:
	run_job: ${{ steps.check_contracts.outputs.run_job }}
	runs-on: ubuntu-latest
	steps:
	- name: Checkout code
	uses: actions/checkout@v2
	with:
	fetch-depth: 2

	- name: check modified contracts
	id: check_contracts
	run: \|
	echo "=============== list modified files ==============="
	git diff --name-only HEAD^ HEAD

	echo "========== check paths of modified files =========="
	git diff --name-only HEAD^ HEAD > files.txt
	while IFS= read -r file
	do
	echo $file
	if [[ $file != contracts/* && $file != test/* ]]; then
	echo "::set-output name=run_job::false"
	else
	echo "Found modified file under the 'contracts' or 'test' folder. Run contract unit tests."
	echo "::set-output name=run_job::true"
	break
	fi
	done < files.txt

	test_contracts:
	needs: check
	if: needs.check.outputs.run_job == 'true'
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- uses: actions/setup-node@v2
	with:
	node-version: '12'
	- run: rm -rf node_modules
	- run: yarn install --frozen-lockfile
	- run: yarn run coverage

Provide feedback