* integrate gherkin/cucumber w/ cypress
- change cypress.json config from e2e back to standard integration
- add cypress-cucumber-preprocessor
- add integration test of about page
* add a title to each page
* add intl to the 404 page
* Refactor explore tool page
- add intl to static strings
- replace component css with <Grid> layout
* Add title to contact page
* add intl to title of page
* Add gherkin tests for nav to about page
- navigate from any page to the about page
- ensure each link has the title correct on that page
* using the higher-level react-testing-library, and regenerating snapshot - renders real DOM elements
* Basic e2e testing with Cypress, following the guide here: https://www.gatsbyjs.com/docs/how-to/testing/end-to-end-testing/ ; needed to install cypress-local to avoid jest-cypress collision
* Adding accessibility testing support and basic a11y tests
* adding failure logging
* Adding nightly test run
* Fix misc stuff from lighthouse (#81)
* Removing local-cypress, relying instead on a combination
of type reference and eslint-plugin-cypress;
adding cypress to jest ignore paths to avoid conflict -
`npm test` is now jest-only, use `npm run test:e2e` to run cypress tests
* updating comment to clarify timezone
