v4.0.0

• Breaking change: Decouple from react-router-dom.
  • You can now provide your custom Link component to mistica using the ThemeContextProvider. There are
    some examples in the examples/ folder on how to use this feature with popular routers, like react-router
    and Next.js router.
  • By default, if you don't provide a custom Link component, @telefonica/mistica will render simple <a>
    elements.
• Reset some browser default styles at component level.
• SSR compatibility to support using @telefonica/mistica in Next.js apps.
• Added a examples/ folder. Added some examples on how to use @telefonica/mistica with common
  meta-frameworks, like Create React App or Next.js
• Some fixes in <Switch /> component to avoid some warnings in newer react versions.