Add proper types for helper `props` #15

	name: CI

	on: [push, pull_request]

	jobs:
	ci:
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@master

	- name: Runs code QA and tests
	run: docker run --rm -v "$(pwd):/app" -w /app -t node:lts-alpine sh -c 'yarn && yarn build'

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