types: add Stringer implementation for List and Tuple #35

	name: Go

	on: [push, pull_request]

	jobs:

	test:
	name: Test
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- uses: actions/setup-go@v1
	with:
	go-version: 1.15
	- name: Get dependencies
	run: go get -v -t -d ./...
	- name: Run tests and generate coverage report
	run: go test -race -coverprofile cover.out -covermode atomic ./...
	- name: Upload coverage to Codecov
	uses: codecov/codecov-action@v1.0.7
	with:
	file: ./cover.out

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