Changes:

• Migration to functional components (with the support for React Hooks)
• Reacts Hooks linting support
• Dependency upgrades
• Linting configuration update
• Formatting configuration update
• Fixes Netlify CMS configuration mismatch (Thanks to @armnetworking for #89).
• Fixes #88 by removing the redundant configuration file
• Stylelint configuration overhaul
• README cleanup